to的各种用法归纳

to的各种用法归纳

一：表示相对，针对

be strange （common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable）to

Air is indispensable to life.

Aircrafts are vulnerable to interference caused by radiation.

This injection will make you immune to infection.

二：表示对比，比较

1：以-ior结尾的形容词，后接介词to表示比较，如：superior ,inferior,prior,senior,junior

The quarrel happened prior to my arrival.

2: 一些本身就含有比较或比拟意思的形容词，如equal，similar，equivalent，analogous

A is similar to

B in many ways.

3：表示一些先后顺序的形容词，如：second,subsequent,next,preliminary,preparatory

Subsequent to the war,they returned to their hometown.

4: to也偶尔出现在个别动词之后,与动词形成固定词组,表示比较,如:prefer to,compare to, in contrast to；compare to sth.表示比喻或比拟,而compare with sth.表示比较,如:

World is usually compared to a stage

Compared with his past,he has changed a lot.

Prefer的正确句型是:prefer A to B或prefer doing A to doing B,但当prefer后接动词不定式时,表示比较的介词to就要改成rather than ,如:

The undaunted soldier preferred death to surrender.

Many people prefer spending money to earning money.

They prefer to pursue careers rather than remain home as house wives.

5: to与及个别的名词构成比较之意,如:alternative

Going to an under water concert is a great alternative to going to dinner.

三: 表示修饰关系

1: 表示回复,反应意思的词,如:answer to question,

solution to problem,response to inquiry,reaction to proposal,reply to letter

2: 表示建筑构件的词汇,如: entry,entrance,approach,access,passage,exit,vent,path

the approach to a bridge引桥

the approach to science

Half of the population was estimated to have no access to the health service.

The access to education 接受教育的机会

The access to medical care 享受公费医疗的权利

3: 表示人物职位和官衔的词,如:assistant to manager, ambassador to Spain, successor to

tradition, heir to throne, deputy to the National People\'s Congress；advisor to the Prime Minister

4: 表示权利和许可的词汇,如:right,admission

The employee finally got the admission to the boardroom.

Everyone has an equal right to …………

5: 表示栅栏或障碍的词汇,如:bars to development,the barrier to progress

6: 表示与书籍,文本相关的词,如:introduction to passage.

7: 表示恭喜或是祝贺,如:

The director proposed a toast to the health of the guests.

Let\'s drink to Dick\'s success in business

8: 另外还有一些名词符合这种用法,有的具有两者息息相关,缺一不可的含义.如:key to door,invitation to party, guide

to action,limitation to life,accessory to school

四: to还具有依据,伴随,和着节奏的含义,如:sing to piano, chance to the tune, stamp to the rhythm of the song, add salt to taste （一）：表示相关联，相连接，如：be related to,be relative to,in relation to,be relevant t

Investigate all the facts related to the problem.

People often linked walth to happiness.

（二）：表示反对和赞同。

1：to引导的表示反对，抗拒，对抗意义的词组。Be opposed to,be oppsist to,be contrary to,be adverse to,be resistant to,be contradictory to,object to,oppose to,deny tp,be aline to

These buildings are resistant to earthquake.

They are to tally opposed to any changes being made in the plans.

2: to引导的表示同意，赞同意义的词组：consent to,subseribe to, The employer consented to give him a salary raise.

表示调整，使符合，使适应的含义，如：adapt to,commodate to, adjust to,conform to,habituate to,fit to,suit to,correspond to,cater to She tried to habituate herself to the style of plain living.

Your action should conform to the interests of the people.

They offered various foods to cater to the need of customers.

His words doesn\'t fit to his actions.

Suit your writing style to the masses.

3: 表示投降,屈服,服从的含义,如:be subject to,be subordinate to,submit to,subject to,surrender to,give in to,confess to,admit to.

The minority is subordinate to the majority少数服从多数

Countries nearby oceans are always subject to earthquake.

He confessed to having robbed the woman of her wallet.

We\'re not the kind of people to yield to any military threat.

五: 表示趋势或倾向,如:tend to,be prone to,be inclined to,be apt

to,be liable to

He\'s liable to seasickness.

You are liable to come to wrong conclusion.

六: 表示对事情的坚持与执着,如:sick to,hold o,adhere to,cling to He still holds on to his original views.

七: 表示约束,局限,如:limit to,confine to,resrict to

He\'s confined to the house by illness.

He confined his remarks to scientific mangement.

八: 表示一种习惯或是一种适应性,如:get （be）to,used to,be accustomed to Finally,the students got used to my teaching method.

九: 表示起因和原由,如:owing to,due to,thanks to,attribute to,come down to

The flight was cancelled due to the thick fog.

The famous artist attributed his success to his wife.

十: 表示目的或结果,如:aim to,lead to,give rise to

I aim to be an excellent college teacher.

His conceit lead to his failure.

These bad condition has given rise to a lot of crises

十一: 表示命运,注定,如:be doomed to,be destined to,

All military adventures by the two super powers are doomed to fail.

十二: 表示数量上的积累或增加,如:in addition to,add to,amount

to

In addition to relief supplies,he also presented with some money.

The annual output of steel amounts to 1200 tons.

十三: 表示全身心投入的含义,如:be addicted to,contribute to,devote to,commit to

He is determined to devote all his life to his.

十四: 表示展望或是回顾,如:look forward to反date back to

The church dates back to the 13th century.

十五: 表示方位概念.如:close to,next to

I don\'t like wool next to my skin.

十六: 表示依靠或借助,如:resort to,turn to,appeal to,

He usually appeals to arms to settle the territory dispute.

十七: 表示有关注,关于: as to,with regard to

十八: 表示关注或重视,如:pay attention to,attach to,

We should attach primary importance to job training.

十九: 表示依据或是根据,如:according to,in proportion to

According to today\'s newspaper,the match will be postponed.

The lending countries subscribe towards capital stock in proportion to heir economic importance.

二十: 表示应该或必须含义的句式, 如:

It\'s time to get up.

We are supposed to get here at seven.

It\'s up to this country to ban nuclear weapons.

常用词组

respond to（反应）, appeal to（吸引）, catch on to（理解）, listen to （收听）,used to（过去常常）,

give birth to,attend to（照料）, see to（负责）, be entitled to（有权）, belong to（属于）, come

to（苏醒）, stand up to（勇敢面对）, help oneself to（请自便）, refer to,to the point（切题）,

Train them to stand up to any severe test in hard.

The ticket entitled you to a free meal in the luxury hotel.

See to it that the children get a hot meal after their swim.

You will catch on to the job shortly after wards.

People usually refer to television for up-to-the-minute news

超全的英语介词用法归纳总结

超全的英语介词用法归纳总结常用介词基本用法辨析 表示方位的介词：in, to, on 1. in 表示在某地范围之内。 Shanghai is/lies in the east of China. 上海在中国的东部。 2. to 表示在某地范围之外。 Japan is/lies to the east of China. 日本位于中国的东面。 3. on 表示与某地相邻或接壤。 Mongolia is/lies on the north of China. 蒙古国位于中国北边。 表示计量的介词：at, for, by 1. at 表示“以……速度”“以……价格”。 It flies at about 900 kilometers an hour. 它以每小时900公里的速度飞行。 I sold my car at a high price. 我以高价出售了我的汽车。 2. for 表示“用……交换，以……为代价”。 He sold his car for 500 dollars. 他以五百元把车卖了。 注意：at表示单价(price) ，for表示总钱数。

3. by 表示“以……计”，后跟度量单位。 They paid him by the month. 他们按月给他计酬。 Here eggs are sold by weight. 在这里鸡蛋是按重量卖的。 表示材料的介词：of, from, in 1. of 成品仍可看出原料。 This box is made of paper. 这个盒子是纸做的。 2. from 成品已看不出原料。 Wine is made from grapes. 葡萄酒是葡萄酿成的。 3. in 表示用某种材料或语言。 Please fill in the form in pencil first. 请先用铅笔填写这个表格。They talk in English. 他们用英语交谈。 表示工具或手段的介词：by, with, on 1. by 用某种方式，多用于交通。 I went there by bus. 我坐公共汽车去那儿。 2. with表示“用某种工具”。 He broke the window with a stone. 他用石头把玻璃砸坏了。注意：with表示用某种工具时，必须用冠词或物主代词。

(完整版)介词for用法归纳

介词for用法归纳 用法1：(表目的)为了。如： They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做？ That’s what we’re here for. 这正是我们来的目的。 What’s she gone for this time? 她这次去干什么去了？ He was waiting for the bus. 他在等公共汽车。 【用法说明】在通常情况下，英语不用for doing sth 来表示目的。如： 他去那儿看他叔叔。 误：He went there for seeing his uncle. 正：He went there to see his uncle. 但是，若一个动名词已名词化，则可与for 连用表目的。如： He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意：若不是表目的，而是表原因、用途等，则其后可接动名词。(见下面的有关用法) 用法2：(表利益)为，为了。如： What can I do for you? 你想要我什么？ We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗？ Do more exercise for the good of your health. 为了健康你要多运动。 【用法说明】(1) 有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等)，当双宾语易位时，通常用for 来引出间接宾语，表示间接宾语为受益者。如： She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意，类似下面这样的句子必须用for： He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思，在一些及物动词后误加介词for： 他们决定在电视上为他们的新产品打广告。 误：They decided to advertise for their new product on TV. 正：They decided to advertise their new product on TV. 注：advertise 可用作及物或不及物动词，但含义不同：advertise sth＝为卖出某物而打广告；advertise for sth＝为寻找某物而打广告。如：advertise for a job=登广告求职。由于受汉语“为”的影响，而此处误加了介词for。类似地，汉语中的“为人民服务”，说成英语是serve the people，而不是serve for the people，“为某人的死报仇”，说成英语是avenge sb’s death，而不是avenge for sb’s death，等等。用法3：(表用途)用于，用来。如： Knives are used for cutting things. 小刀是用来切东西的。 This knife is for cutting bread. 这把小刀是用于切面包的。 It’s a machine for slicing bread. 这是切面包的机器。 The doctor gave her some medicine for her cold. 医生给了她一些感冒药。 用法4：为得到，为拿到，为取得。如： He went home for his book. 他回家拿书。 He went to his friend for advice. 他去向朋友请教。 She often asked her parents for money. 她经常向父母要钱。

介词to的用法归纳

一：表示相对，针对 be strange (common, new, familiar, peculiar, distinct, sensitive,immune, vulnerable, indispensable) to Air is indispensable to life. Aircrafts are vulnerable to interference caused by radiation. This injection will make you immune to infection. 二：表示对比，比较 1：以-ior结尾的形容词，后接介词to表示比较，如：superior ,inferior,prior,senior,junior The quarrel happened prior to my arrival. 2: 一些本身就含有比较或比拟意思的形容词，如equal，similar，equivalent，analogous A is similar to B in many ways. 3：表示一些先后顺序的形容词，如：second,subsequent,next,preliminary,preparatory Subsequent to the war,they returned to their hometown. 4: to也偶尔出现在个别动词之后,与动词形成固定词组,表示比较,如:prefer to,compare to,incontrast to compare to sth.表示比喻或比拟,而compare with sth.表示比较,如: World is usually compared to a stage Compared with his past,he has changed a lot. Prefer的正确句型是:prefer A to B或prefer doing A to doing B,但当prefer后接动词不定式时,表示比较的介 词to就要改成rather than ,如: The undaunted soldier preferred death to surrender. Many people prefer spending money to earning money. They prefer to pursue careers rather than remain home as house wives. 5: to与及个别的名词构成比较之意,如:alternative Going to an under water concert is a great alternative to going to dinner. 三: 表示修饰关系 1: 表示回复,反应意思的词,如:answer to question, solution to problem,response to inquiry,reaction to proposal,reply to letter 2: 表示建筑构件的词汇,如: entry,entrance,approach,access,passage,exit,vent,path the approach to a bridge引桥 the approach to science Half of the population was estimated to have no access to the health service. The access to education 接受教育的机会 The access to medical care 享受公费医疗的权利 3: 表示人物职位和官衔的词,如:assistant to manager, ambassador to Spain, successor to tradition,heir to throne,deputy to the National People’s Congress advisor to the Prime Minister 4: 表示权利和许可的词汇,如:right,admission The employee finally got the admission to the boardroom. Everyone has an equal right to …….. 5: 表示栅栏或障碍的词汇,如:bars to development,the barrier to progress 6: 表示与书籍,文本相关的词,如:introduction to passage.

介词for用法完全归纳

用法1：(表目的)为了。如： They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做? That’s what we’re here for. 这正是我们来的目的。 What’s she gone for this time? 她这次去干什么去了? He was waiting for the bus. 他在等公共汽车。 【用法说明】在通常情况下，英语不用for doing sth 来表示目的。如：他去那儿看他叔叔。 误：He went there for seeing his uncle. 正：He went there to see his uncle. 但是，若一个动名词已名词化，则可与for 连用表目的。如： He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意：若不是表目的，而是表原因、用途等，则其后可接动名词。(见下面的有关用法) 用法2：(表利益)为，为了。如： What can I do for you? 你想要我什么? We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗? Do more exercise for the good of your health. 为了健康你要多运动。 【用法说明】(1) 有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等)，当双宾语易位时，通常用for 来引出间接宾语，表示间接宾语为受益者。如：

可用虚拟语气的用法总结

虚拟语气的用法总结 语气：语气是动词的一中形式，它表示说话人对某一行为或事情的看法和态度。 虚拟语气表示动作或状态不是客观存在的事实，而是说话人的主观愿望，假设或推测等。如If I were you, I should study English. 一．虚拟语气在条件从句的用法 条件句有两类，一类是真实条件句；一类是非真实条件句，也就是虚拟条件句。 如果假设的情况是有可能发生的，就是真实条件句，谓语要用陈述语气。如If it doesn’t rain tomorrow, we will go to the park. 如果假设的情况是过去或现在都不存在的，或将来不大可能发生的，则是虚拟条件句。如If he had seen you yesterday, he would have asked you about it. 在含有虚拟条件句的复合句中，主句 If her mother had taken the doctor’s advice, she would/might have got well earlier. If it were to rain tomorrow, the match would be canceled. 有时候省略if，采用局部倒装语序。把had /should/were 等动词（不包括行为动词）移到从句的句首。例如： Were it to rain tomorrow, our picnic would be canceled. Had it not been for the storm, we would have arrived in time. Should the earth stop running, what would happen? 二. 错综时间条件句 有时条件从句的动作和主句动作发生的时间不一致，这时需要根据意思采用表示不同时间的动词形式来进行调整。 If she had taken the doctor’s advice, she might still be alive. If I were you, I would have accepted their terms. 三．含蓄条件句

常见的介词带to的短语

常见的介词带t o的短 语 Company Document number：WTUT-WT88Y-W8BBGB-BWYTT-19998

常见的介词带to的短语？ be / get / become used to 习惯于？ be given to 喜欢；癖好？ be related to 与…有关系？ be addicted to 沉溺于；对…上瘾？ be opposed to 反对？ devote oneself to献身于；专心于？ be devoted to 致力于；忠诚于？ be admitted to 被…录取；准进入？ be reduced to 沦为？ reduce…to…使…沦为？ be attached to附属于；喜欢；依恋？ be adjusted to 适应？ be known to 为…所知？ be married to 和…结婚？ be sentenced to被判处？ be connected to 和…连在一起？ be exposed to 暴露于；遭受？ be compared to 被比喻成？ compare… to…把…比作…？ be engaged to 与…订婚？ be / become / get accustomed to 同意某事（比较：agree to do sth. 同意做某事）？ prefer… to…更喜欢？ take / make a trip to到…地方去？ join…to…把…和…连接起来？ turn a blind eye to对…视而不见？ turn a deaf ear to 对…充耳不闻？ show honor to向…表示敬意？ put an end to(bring… to an end) 结束？ set fire to 放火烧……？ drink (a toast) to 为……干杯？ propose a toast to 提议……？ happen to…发生了……事？ occur to sb. 想起；想到？ total up to 总计达？ be close to 几乎；将近？ hold to 坚持；抓住？ help oneself to 随便用……？ hold on to 抓住；固守？ do harm to 对……有害处？ do wrong to 冤枉某人？ date back to 追溯到？

英语介词for的用法归纳总结.doc

英语介词for的用法归纳总结用法1：(介词for表目的)为了 They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做? That s what we re here for. 这正是我们来的目的。 What s she gone for this time? 她这次去干什么去了? He was waiting for the bus. 他在等公共汽车。 【用法说明】在通常情况下，英语不用for doing sth 来表示目的 他去那儿看他叔叔。 误：He went there for seeing his uncle. 正：He went there to see his uncle. 但是，若一个动名词已名词化，则可与for 连用表目的 He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意：若不是表目的，而是表原因、用途等，则其后可接动名词。(见下面的有关用法) 用法2：(介词for表利益)为，为了 What can I do for you? 你想要我什么? We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗?

Do more exercise for the good of your health. 为了健康你要多运动。 【用法说明】(1) 有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等)，当双宾语易位时，通常用for 来引出间接宾语，表示间接宾语为受益者 She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意，类似下面这样的句子必须用for： He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思，在一些及物动词后误加介词for： 他们决定在电视上为他们的新产品打广告。 误：They decided to advertise for their new product on TV. 正：They decided to advertise their new product on TV. 注：advertise 可用作及物或不及物动词，但含义不同：advertise sth=为卖出某物而打广告;advertise for sth=为寻找某物而打广告advertise for a job=登广告求职。由于受汉语为的影响，而此处误加了介词for。类似地，汉语中的为人民服务，说成英语是serve the people，而不是serve for the people，为某人的死报仇，说成英语是avenge sb s death，而不是avenge for sb s death，等等。 用法3：(介词for表用途)用于，用来 Knives are used for cutting things. 小刀是用来切东西的。

for的用法完全归纳

for的用法完全归纳 用法1：(表目的)为了。如： They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做？ That’s what we’re here for. 这正是我们来的目的。 What’s she gone for this time? 她这次去干什么去了？ He was waiting for the bus. 他在等公共汽车。 在通常情况下，英语不用for doing sth 来表示目的。如：他去那儿看他叔叔。 误：He went there for seeing his uncle.正：He went there to see his uncle. 但是，若一个动名词已名词化，则可与for 连用表目的。如： He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意：若不是表目的，而是表原因、用途等，则其后可接动名词。 用法2：(表利益)为，为了。如： What can I do for you? 你想要我什么？ We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗？ Do more exercise for the good of your health. 为了健康你要多运动。 (1)有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等)，当双宾语易位时，通 常用for 来引出间接宾语，表示间接宾语为受益者。如： She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意，类似下面这样的句子必须用for： He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思，在一些及物动词后误加介词for： 他们决定在电视上为他们的新产品打广告。 误：They decided to advertise for their new product on TV. 正：They decided to advertise their new product on TV. 注：advertise 可用作及物或不及物动词，但含义不同：advertise sth＝为卖出某物而打广告；advertise for sth＝为寻找某物而打广告。如：advertise for a job=登广告求职。由于受汉语“为”的影响，而此处误加了介词for。类似地，汉语中的“为人民服务”，说成英语是serve the people，而不是serve for the people，“为某人的死报仇”，说成英语是avenge sb’s death，而不是avenge for sb’s death，等等。 用法3：(表用途)用于，用来。如： Knives are used for cutting things. 小刀是用来切东西的。 This knife is for cutting bread. 这把小刀是用于切面包的。 It’s a machine for slicing bread. 这是切面包的机器。 The doctor gave her some medicine for her cold. 医生给了她一些感冒药。 用法4：为得到，为拿到，为取得。如： He went home for his book. 他回家拿书。 He went to his friend for advice. 他去向朋友请教。 She often asked her parents for money. 她经常向父母要钱。 We all hope for success. 我们都盼望成功。 Are you coming in for some tea? 你要不要进来喝点茶？ 用法5：给(某人)，供(某人)用。如： That’s for you. 这是给你的。 Here is a letter for you. 这是你的信。 Have you room for me there? 你那边能给我腾出点地方吗？ 用法6：(表原因、理由)因为，由于。如：

介词for 的常见用法归纳

介词for 的常见用法归纳 贵州省黔东南州黎平县黎平一中英语组廖钟雁介词for 用法灵活并且搭配能力很强，是一个使用频率非常高的词，也是 高考必考的重要词汇，现将其常见用法归纳如下，供参考。 1.表时间、距离或数量等。 ①意为“在特定时间，定于，安排在约定时间”。如： The meeting is arranged for 9 o’clock. 会议安排在九点进行。 ②意为“持续达”，常于last、stay 、wait等持续性动词连用，表动作持续的时间，有时可以省略。如： He stayed for a long time. 他逗留了很久。 The meeting lasted （for）three hours. 会议持续了三小时。 ③意为“（距离或数量）计、达”。例如： He walked for two miles. 他走了两英里。 The shop sent me a bill for $100.商店给我送来了100美元的账单。 2. 表方向。意为“向、朝、开往、前往”。常与head、leave 、set off、start 等动词连用。如： Tomorrow Tom will leave for Beijing. 明天汤姆要去北京。 He put on his coat and headed for the door他穿上大衣向门口走去。 介词to也可表示方向，但往往与come、drive 、fly、get、go、lead、march、move、return、ride、travel、walk等动词连用。 3.表示理由或原因,意为“因为、由于”。常与thank、famous、reason 、sake 等词连用。如: Thank you for helping me with my English. 谢谢你帮我学习英语。 For several reasons, I’d rather not meet him. 由于种种原因，我宁可不见他。 The West Lake is famous for its beautiful scenery.西湖因美景而闻名。 4.表示目的,意为“为了、取、买”等。如: Let’s go for a walk. 我们出去散步吧。 I came here for my schoolbag.我来这儿取书包。 He plays the piano for pleasure. 他弹钢琴是为了消遣。 There is no need for anyone to know. 没必要让任何人知道。 5.表示动作的对象或接受者,意为“给、为、对于”。如: Let me pick it up for you. 让我为你捡起来。 Watching TV too much is bad for your health. 看电视太多有害于你的健康。 Here is a letter for you. 这儿有你的一封信。

for循环的使用和用法

简单的来说，++i 和i++,在单独使用时，就是i=i+1。 而a = ++i，相当于i=i+1; a = i; 而a = i++，相当于 a = i; i=i+1; 如果实在搞不明白++ --怎么回事，那也不是什么天塌下来的事。 因为a=++i完全可以写成i++; a=i。 a=i++完全可以写成a=i; i++。 而且，这也是一种好的程序风格：++ -- 语句如非特殊需要，请单独一行使用。假设i=1 如果执行a=i++ 完之后, a=1, i=2 如果执行a=++i 结果是, a=2, i=2 要分清楚++i,和i++的区别. i++是先执行当前命令,再执行递增. ++i是先递增,再执行命令 缺点： 对于数组，不能方便的访问下标值； 对于集合，与使用Interator相比，不能方便的删除集合中的内容（在内部也是调用Interator）. 除了简单遍历并读取其中的内容外，不建议使用增强的for循环。 一、遍历数组 语法为: for (Type value : array) { expression value; } //以前我们这样写： void someFunction () {

int[] array = {1,2,5,8,9}; int total = 0; for (int i = 0; i < array.length; i++) { total += array[i]; } System.out.println(total); } //现在我们只需这样写（和以上写法是等价的）： void someFunction () { int[] array = {1,2,5,8,9}; int total = 0; for (int n : array) { total += n; } System.out.println(total); } 这种写法的缺点： 显而易见，for/in(for each)循环自动控制一次遍历数组中的每一个元素，然后将它赋值给一个临时变量（如上述代码中的int n），然后在循环体中可直接对此临时变量进行操作。这种循环的缺点是： 1. 只能顺次遍历所有元素，无法实现较为复杂的循环，如在某些条件下需要后退到之前遍历过的某个元素；

虚拟语气用法总结讲课稿

虚拟语气用法总结

虚拟语气用法总结 朱世梅 新时代大学英语中针对虚拟语气的练习题较多,而学生们往往把握不好虚拟语气的正确使用,现将其用法总结如下: 一.虚拟语气在英语里主要用来表达： a. 非真实的情景，不可能发生的事，即某种与事实相反或难以实现的情况，或说话人主观愿望。 b. 与客观事实相反地情景，即强制性虚拟语气，表示建议、命令、劝告这一类的意思上，表示强烈的要求做到、必须做到这样的含义。 c. 虚拟语气的表达形式是通过动词的变化形式表达的，其特点是主从句时态的不一致，而且一般有明显得标志。 二.虚拟语气的考点为： 1.If 句型 (共有三种句型) 非真实条件句: a.与现在的事实相反：从句用一般过去时，主句的谓语用would (could, might) ＋动词原形 If I were Bill Gates, I would not work so hard every day. b.与过去的事实相反：从句用过去完成时，主句的谓语用would (could, might) ＋现在完成时 If I had gone to America when I graduated from middle school, I would have got my PhD degree. c.与将来的事实相反：从句用should (were to，did) + 动词原形，主句的谓语用would (could, might) ＋动词原形 If it should/were to snow tomorrow, I would go skiing.

注意：虚拟条件句的倒装虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should或had 移到从句句首，实行倒装。 Eg: Should it rain, the crops would be saved. =Were it to rain, the crops would be saved. Eg:_____ to do the work, I should do it some other day. A. If were I B. I were C. Were I D. Was I 答案C. 在虚拟条件状语中如果有were, should, had这三个词，通常将if省略，主语提前, 变成 were, should, had +主语的形式。但在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说 Were I not to do., 而不能说 Weren't I to do. d.混合条件句主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。例如：条件句动作发生在过去，主句的动作发生在现在)谓语动词要根据表示的时间进行调整。 Eg: If it had rained last night (过去), it would be very cold today (现在). 2.Wish 句型表达“但愿…，要是…多好”的语气表示与事实相反的情况，或表示将来不太可能实现的愿望。其宾语从句的动词形式为： He wished he hadn't said that. 他希望他没讲那样的话。 I wish it would rain tomorrow. 我希望明天下雨就好了。 Wish to do表达法: Wish sb / sth to do I wish to see the manager. = I want to see the manager. I wish the manager to be informed at once. (= I want the manager to be informed at once.) 3.在强制性语气的宾语从句中的运用即表示建议、命令、劝告、决心等主观色彩的动词 + that + (should) + 动词原形，其中should 经常被省略。这类动词包括： suggest, propose, recommend, demand, order, command, desire, require, insist,

介词to的用法

介词to的用法 1.表示目的地：“去，到” go to /come to /return to 回到/get to 到达/walk to /fly to /drive to turn to the left 向左转 2.表示接受者：在双宾语结构中，有些Vt.后的双宾换位时，要加to引出间接宾语 give/show/pass//hand send/post/mail ltake/bring递/offer owe欠 return 归还 sell 3.表示时间：用于时间的倒读法中： Ten to eight 7:50 4.表示方位：“在....外部不接壤” Japan is to the east of China. 日本在中国东边。 5.表示某人对某事的态度反应：固定结构：to+one’s+情感名词 to one’s surprise 使某人惊讶的是 to one’s joy/delight 使某人高兴的是 to one’s sadness 使某人难过的是 to one’s disappointment 使某人失望的是 to one’s satisfaction 使某人满意的是 6.有些名词的所有格习惯用to而不用of表示 The key to the door 门的钥匙 The answer to the question 问题的答案 The entrance to the building 大楼的入口 7.常见带介词to的词组 listen to 听 lead to 导致 belong to 属于 Sth happened to sb 某人发生了某事 According to 根据 Thanks to sb/sth 多亏了 pay attention to 注意 look forward to 盼望 be close to 与...靠近 be harmful to 对...有害

介词的归纳

介词的归纳 一、单项选择介词 1．（重庆）Last year was the warmest year on record, with global temperature 0.68 ℃ ________ the average. A．below B．on C．at D．above 【答案】D 【解析】 【详解】 考查介词。句意：去年是有纪录以来最热的一年，全球平均气温上升0.68度。A. below低于；B. on在……之上；C. at在；D. above超过，多于。根据前一句Last year was the warmest year on record推知，温度应该是上升了，故用介词above。 【点睛】 with的复合结构中，复合宾语中第一部分宾语由名词和代词充当，第二部分补足语由形容词，副词，介词短语，动词不定式或分词充当。而本题考查with +名词/代词+介词短语,而介词的使用则根据当时语境的提示来做出相应的变化即句中的the warmest year on record 起重要作用，可知高出平均气温。 2．According to Baidu, the high-quality content of Cloud Music will reach massive users _______ Baidu’s app and video platform. A．in honor of B．in view of C．by virtue of D．by way of 【答案】C 【解析】 【详解】 考查介词短语。句意：根据百度的说法，云音乐的高质量内容将借助于百度应用和视频平台到达广大用户。A. in honor of向……致敬；B. in view of考虑到；C. by virtue of借助于；D. by way of通过。根据句意可知，此处要表达“借助于”。故选C项。 3．We charge parcels ________ weight, rather than individual units. A．in honor of B．in contact with C．in terms of D．in connection with 【答案】C 【解析】 【详解】 考查介词短语。句意：我们根据包裹的重量，而不是包裹的件数收费。A. in honor of为了对……表示敬意；B. in contact with与……有联系，接触；C. in terms of根据，在……方面；D. in connection with与……有关，有联系。表示根据什么计费。故选C。 【点睛】

(完整)虚拟语气用法归纳,推荐文档

虚拟语气用法归纳 虚拟语气主要指的的是带有非真实条件状语从句的复合句，表达的是说话人的遗憾后悔的语气，愿望以及建议，命令，要求等等的情感，往往说的是与事实相反或者没办法实现改变的东西。虚拟语气主要表现为在对过去现在或者将来的情况做出假设后，有可能出现的情况。 虚拟语气的内容主要有三大模块，第一模块就是涉及到条件从句部分的内容。这一部分的虚拟语气主要体现在三个方面：基本用法，各自为政，以及含蓄之美。 下表就是条件从句虚拟语气的基本用法： 通常，在上面表格里反映的是非真实条件句的虚拟语气模式，从句和主句的谓语动词时间是一致的，如果两者时间不一致，此时就是混合型虚拟语气。混合型虚拟语气的使用要求“各自为政”，即从句和主句根据各自假设的时间不同，采用上面表格中对应的的谓语动词形式。 如何“各自为政”呢？这就像是数学里的排列组合，一边有三种情况，交叉一搭配就出现了好多种情况。不管怎样，我们要遵循一个原则，就是“各自为政”。例如，从句是对过去情况的假设，而主句则是对现在情况的假设，那我们在使用时，从句就用过去完成式，而主句要用would/could do的形式。当然，也不是所有的AB配就是合理的，有时候在具体语境下，会出现矛盾的情况，这时我们就要结合要表达的意思来判断他们是对什么情况的假设，选择合适的形式。一般而言，主句的假设时间会发生在从句的假设时间之后。因为是有这么一个条件才会出现主句的现状。因此在此类的完成句子练习中，我们要特别提醒注意时间状语的暗示 1. If I had seen you, I would not be so worried now. (从句是对过去的假设，主句是对现在的假设) 2. If you had not watched television so late last night, you would not be so sleepy now.( 从句是对过去的假设，主句是对现在的假设) 3. If I were you, I would seize the chance to go abroad. (从句和主句都是现在的假设) 4. Had you followed the doctor’s suggestion, you would be fine now.( 从句是对过去的假设，主句是对现在的假设) 5. If I had made some money last summer, I would go on holiday next month.( 从句是对过去的假设，主句是对将来的假设) 6. You didn’t let me drive. If we had driven in turns, you wouldn’t be so tired now. (从句是对过去的假设，主句是对现在的假设) 7. If Jack hadn’t met Rose on his voyage, he would be alive now. (从句是对过去的假设，主句是对现在的假设) 8. If Lily didn’t attend today’s party, she could not have the chance to work in the company next week. (从句是对现在的假设，主句是对将来的假设) 9. Had Father followed my travel plan , our family would not stay at home now. (从句是对