practise和practice用法一样吗

不一样。practice有两种词性，既能做动词使用，也能做名词使用。如practice speaking English，练习说英语；do some practice 做一些练习。practise只有动词词性，用法和意思与practice相同。

practise与practice的区别：

1、practise与practice的书写形式不同。

practise是“practice”的变体。practise有练习；执业；实习；积极从事的意思。

2、practise与practice的词性不同。

practice有两种词性，既能做动词使用，也能做名词使用，作名词时翻译为“实践；练习；惯例；（医生或律师的）业务”。而practise只有动词词性。

3、应用广泛程度不同。

practice比practise的应用范围广。偶尔也有通用的情况。

1

频率副词用法

频率副词：一般用来表示动作发生的频率。往往放在句子中间，实义动词之前，非实义动词之后；非实义动词分为1 系动词助动词帮助动词构成时态（do,does,will,shall,have,had,has）.3 情态动词（must,can,may)。除此之外，都叫做实义动词。 常见频度副词按频率大小排列如下： always（100%）>usually（80%）>often（60%）>sometimes（40%）>seldom （20%）>hardly (10%)>rarely never（1%） 1.频率副词是表示与次数,频率有关的副词,如: always(总是), usually(通常),frequently（经常）often （经常）sometimes(有时), seldom(不常),rarely（极少），never（从不）once(一次), twice(两次)，等。 2.频率副词等级: all the time 100%； almost , always 90%； generally , usually 80%； often , frequently 60-70%； as often as not 40-50%； sometimes , at times 20-30%； occasionally , from time to time 10%； hardly , seldom , rarely 5%； never 0%。 3.频率副词用在be动词后。 He always gets up at 6:30. 他经常起床。 4.频率副词用在主要动词前。 My father usually walks home.

新标准大学英语综合教程第三单元reading_practise

The Internet is overwhelmingly a power for good. It provides cheap and easy access every moment of every day to a vast reservoir of information and entertainment and it is transforming the nature of commerce and government. However, with approximately one billion users worldwide accessing almost 75 million websites, there is bound to be some offensive, and even illegal, use of the net. There is a dark side to the Internet. It would be naive to deny it. Crime on the net takes many forms including hacking, viruses, fraud and so on. While the Washington State Attorney General's Office can help propose legislation to protect consumers against Internet crime and while we can fight Internet crime through our high-tech unit using the state's Consumer Protection Act, when it comes to other types of crimes, our efforts are limited by the office's lack of original criminal jurisdiction (司法权). If you are a victim of an Internet crime, we encourage you to contact IC3—The Internet Crime Complaint Center—a partnership between the Federal Bureau of Investigation (FBI) and the National White Collar Crime Center (NW3C). IC3's mission is to serve as a vehicle to receive, develop, and refer criminal complaints regarding the rapidly expanding arena of cyber crime. The IC3 gives the victims of cyber crime a convenient and easy-to-use reporting mechanism that alerts authorities of suspected criminal or civil violations. For law enforcement and regulatory agencies at the federal, state, local and international level, IC3 provides a central referral (参照) mechanism for complaints involving Internet related crimes. The IC3 has received complaints crossing the spectrum (围) of cyber crime matters, to include online fraud in its many forms including Intellectual Property Rights (IPR) matters, computer intrusions (hacking), economic espionage (theft of trade secrets), online extortion, international money laundering, identity theft, and a growing list of Internet facilitated crimes. 1.Which of the following is NOT true according to the passage? A. The Internet can provide a large amount of information. B. The Internet is controlled by the government.

频度副词及时间表达法

频度副词 含义：表示次数，频率的副词称为频度副词。比如像usually,sometimes,always,often. 位置：（1）在be动词之后，eg：she is sometimes very busy.他有时很忙。 （2）在第一个助动词或情态动词之后，eg:I will never forget the first time I met you.我永远不会忘记我们的第一次见面。 （3）在实意动词之前。We often go there.我们经常去那儿。 （4）sometimes可放在句首、句中或句末，often放在句中或句末。Eg：sometimes she watches TV.他有时看电视。She watches TV often. 用法：often,always,usually,等常和一般现在时连用，表示经常或反复发生的动作。Eg：it often rains here. ·对频度副词的提问用how often. Eg;I sometimes write to my brother..有时候，我写信给我的弟弟。 How often do you write to your brother?你多久给你弟弟写一次信？ 辨析：sometimes,some times,sometime,some time Sometimes,频度副词，意为“有时” Some times名词短语，意为“好多次，”“几倍’ sometime副词意为过去或将来的某个时候 Some time名词短语意为“一段时间” Eg：I sometimes play games with her.我有时和他玩游戏。 I have read the book some times.这本书我已经读了这本书好几遍了。 Come to see us sometime.找个时间来看我们。 I will stay here for some time.我将在这儿呆一段按时间。 常见频度副词按频率大小排列如下 Always>usually>often>sometimes>hardly(几乎不）>never(从不） 通常来说，always表示100%,usually表示80%，often表示60%，sometimes表示40%,seldom 表示20%，never表示0%。 Exercise: 1.I______ride a bike to school.But this morning I took a taxi because I got up late. A.Never B. Sometimes C.seldom D. Usually 讲解：我____骑自行车去学校，但是今天早上我打了出租车，因为我起床晚了。通过后面的句子今天早上我起床晚了，打了出租车可以看出我是经常骑自行车的。那表示经常，常常的就只有D选项了。never是从不的意思，sometimes表示有时的意思。seldom表示很少的意思 2.I can _____be a nurse.I’m not very patient person. A.Seldom B.ever C. Never D. Always 讲解：我____成为一个护士。我不是一个有耐心的人。从后面我不是一个有耐心的人，就知道我不可能成为一名老师，所以我们选表示否定的词，那我们就选到C.ever表示曾经，always 表示总是，一直。seldom表示很少。 3.Now the train service is very good.The trains are ______on time. A.hardly B.always C.never D.sometimes 讲解：现在火车服务已经非常好了，火车_____很准时。那火车服务很好了的话，我们首先可以排除的是never 和hardly.sometimes 是有时的意思，always是一直总是的意思，火车总是很准时。 4.Were you often late for school last term,Tom?

because,since,as,for的用法区别

because、since、as、for的用法区别 because、since、as、for这几个词都是表示“原因”的连词，语气由强至弱依次为：because→since→as→for。其中because、since和as均为从属连词，引导原因状语从句；而for是并列连词，引导并列句。 ?because because表示直接原因，它所指的原因通常是听话人所不知道的，其语气最强。常用来回答why的提问，一般放在主句之后，也可以单独存在例如： (1)Istayed at home because it rained. 因为下雨，我呆在家里。 (2)B ecause Lingling was ill, she didn’t come to school. 玲玲因为生病，没有上学。 (3)—Why is she absent? 她为什么缺席? —Because she is sick. 因为她病了。 (4)此外，在强调句型中只能用because。例如， It was because I missed the early bus that I was late for school. 我上学迟到是因为我错过了早班车。 ?since since侧重主句，从句表示显然的或已为人所知的理由，常译为“因为、既然”，语气比because稍弱，通常置于句首，表示一种含有勉强语气的原因。例如： (1)Si nce he asks you, you’ll tell him why. 他既然问你了，那就告诉他为什么吧。 (2)Si nce everyone is here, let’s start. 既然大家都到齐了，我们就是出发吧。 (3)Since I understood very little Japanese, I c ouldn’t follow the conversation. 我日语懂得不多，因而听不懂对话。 ?as as是常用词，它表示的“原因”是双方已知的事实或显而易见的原因，由于理由不是很重要，含义与since相同，但语气更弱，没有since正式，常译为“由于，鉴于”。从句说明原因，主句说明结果，主从并重。例如：

(完整word版)几个频率副词的用法知识点及练习题,推荐文档

频率副词 1. 频率副词的用法 ★ always always 意为“总是”，频率最高，表示动作持续，没有间断，也可以表示讨厌等感情色彩。e.g.（1）The sun always rises in the east. 太阳总是从东方升起。 （2）He is always smoking. 他总是抽烟。 ★ usually usually意为“通常”,即很少例外，频率仅次于always. e.g. （1）He usually goes to school by bike. 他通常骑自行车上学。 ★ often often意为“经常，常常”，意思为“常常, 经常”，不如usually那么频繁。e.g. （1）Children don't often do homework. 孩子们经常不写作业。 （2）He is often late for school. 他经常上学迟到。 ★ sometimes sometimes意思为“有时，不时”，表示次数较少（低于often所表达的次数），常常与一般现在时或一般过去时连用。e.g. （1）Sometimes he goes to work by bike, and sometimes he goes by bus. 有时候他骑自行车上班，有时候他乘公共汽车上班。 （2）Sometimes I helped my parents in the house. 有时候我帮助父母做家务。 ★ hardly hardly意思为“难得, 几乎从来不”，它所表示的次数非常少。e.g. （1）He hardly drinks. 他几乎不喝酒。 （2）She hardly plays cards. 她几乎不打牌。 ★ never never意思为“决不, 从未”，表示一次也没有。e.g. （1）He never lives there. 他从来都没有在那儿住过。 （2）She never has anything to do. 她一向无所事事。 2. 频度副词的位置: ★频度副词在句中习惯上位于be动词、助动词之后,行为动词之前。如: （1）She is often late for school.她上学经常迟到。 （2）He usually goes to bed at about 12.他通常(午夜)十二点钟睡觉。 （3）When do you usually get up in the morning?早上你通常什么时候起床？ ★sometimes是个特殊的频度副词,既可以放在be动词、助动词之后,行为动词之前,也可以放在句首,还可以放在句尾。如: （1）I sometimes think that it is a great mistake.我有时想这是一个大错。 （2）Sometimes I help my mother in the house.有时候我帮助妈妈做家务。 ★often可以放在句中,也可放在句尾,习惯上不放在句首。如: （1）We have been there quite often.我们经常到那儿去。 （五）练习题

practice 和 practise 的用法区别

英语中存在很多的单词因为拼写的一点差异而容易被误用，例如：advice 和advis，dependent 和 dependant等，还有 practice 与 practise，但是它们的区别与 advice 和 advise 的区别不一样。 一、在美式英语中，practice 被用作名词和动词，而在英式英语中，practice 只能被用作名词，例如： practice 作名词，意为“实践；实际行动；通常的做法；惯例；常规；惯常做的事；习惯；习俗”，常用介词 in 连用为 in practice，例如： You need more practice. 你需要更多的实践。 It is common practice in the States to tip the hairdresser. 在美国给理发师小费是很普遍的做法。 What can European companies learn from Japanese business practices? 欧洲企业能从日本的商业实践中学到什么？ practice 作动词，意为“练习，实习，实行”，例如： I’m good at tennis but I need to practice my serve. 我网球打得很好，但我需要练习发球。 The firm has been practicing law for over a hundred years. 这家公司从事法律业务已有一百多年了。 二、在英式英语中，practise 被用作动词，意为“练习，训练，经常做，从事”，例如： She's practising for her piano exam. 她在练习准备钢琴考试。 I've been practising my serve for weeks. 我练发球有好几周了。 Do you still practise your religion? 你还奉行你的宗教信仰吗？ 三、两者的区别 在美式英语中，practice 被用作名词和动词，不用 practise，而在英式英语中，practise 被用作动词，而 practice 被用作名词，所以不管是美式英语还是英式英语，把 practice 当作名词用都是正确的，但是在英式英语中，只能用practise 当动词。

英语频度副词复习要点(大全)

英语频度副词复习要点（大全） 本站特作约作者唐小舟 一、频度副词的概念与用法 频度副词是指表示动作发生的次数副词，常见有的?n ever, seldom, sometimes, frequently, often, usually, always 等。频度副词通常位于实义动词之前，动词?b e、助动词、情态动词等之后。如：We often get together. 我们常常聚会。 Jane usually goes to work by bike. 简通常骑自行车上班。 He sometimes goes there on business. 他有时到那里出差。 He can never understand. 他永远也不会明白的。 I was never very good at maths. 我的数学从来不好。 I shall always remember this. 我将永远记住这一点。 You have often been told not to do that. 多次告诫过你别干那事。 注：如果有两个助动词，频度副词通常放在第一个助动词后面。如： We have never been invited to one of their parties. 他们聚会，一次也没邀请过我们。 She must sometimes have wanted to run away. 她有时候一定想到过要逃走。 二、频度副词位于助动词之前两种情况 1.为了表示强调，频度副词有时也可位于动词?b e、助动词、情态动词之前；此时助动词等应重读。如：

She always was late. 她老是迟到。 I never can remember. 我永远也记不住。 She hardly ever has met him. 她几乎从来没有遇见过他。 He never should have joined the army. 他根本不应当参军。 2.在简略答语中，当频度副词与动词?b e、助动词或情态动词位于句末时，频度副词必须前置。如： “Philip is late again.” “Yes, he always is.”“菲利普又迟到了。”“是的，他总是迟到。” “Can you park your car near the shops?” “Yes. I usually can.” “你可以在商店附近停车吗??”“是的，通常可以。” I know I should take exercise, but I never do. 我知道我应该进行体育锻炼，但我从来没这样做过。 三、频度副词位于句首的用法 1.sometimes常可用于句首。如： Sometimes she comes late. 有时她来得晚。 Sometimes she didn’t agree with me. 有时她和我意见不一致。 Sometimes we get a lot of rain in August. 有时在?8月份雨水很大。 2.often用于句首时，通常表示强调，且其前一般有?q uite, very修饰。如： Very often he comes in late. 他常常迟到。 Quite often the phone rings when I’m in the bath. 电话经常在我洗澡时响。 https://www.wendangku.net/doc/aa14311428.html,ually有时也用于句首，其前不用修饰语。如： Usually I get up early. 我平时起得早。

新标准大学英语综合教程第五单元reading-practise

There are three kinds of goals: short-term, medium-term and long-term goals. Short-term goals are those that usually deal with current activities, which we can apply on a daily basis. Such goals can be achieved in a week or less or two weeks, or possible months. It should be remembered that just as a building is no stronger than its foundation, our long-term goals cannot amount to very much without the achievement of solid short-term goals. Upon completing our short-term goals, we should date the occasion and then add new short-term goals that will build on those that have been completed. Medium-term goals build on the foundation of the short-term goals. They might deal with just one semester of school or the entire school year, or they could even extend for several years. Any time you move a step at a time, you should never allow yourself to become discouraged or overwhelmed. As you complete each step, you will enforce the belief in your ability to grow and succeed. And as your list of completion dates grow, your motivation and desire will increase. Long- term goals may be related to our dreams of the future. They might cover five years or more. Yet life is not a static thing. We should never allow a long-term goal to limit us or our course of action. 1.Our long-term goals do not mean anything ________________. A. unless we complete our short-range goals B. unless we remember them all the time C. unless we write down the dates D. unless we put forward some plans 2.When we complete each step of our goals, ________________. A. we will win final success B. we are overwhelmed C. we will build up confidence of success D. we should have strong desire for setting new goals

中考英语：since与for用法

现在完成时态中的since 与for 1. 实例： We have studied English for more than 2 years. 我们学英语已有两年多时间了。 She has been ill since last Sunday. 她从上周星期天一直病到现在。 2. 用法说明： (1) 介词for 短语表示一个时间段，指某个动作或情况到现在为止已持续了多久，提问时用how long；since 作为介词，接一个时间名词，作为连词，引导一个时间状语从句(从句动词一般是短暂性动词)，since 表示“自…以来”，指某个动作或情况从过去某一点时间一直持续到现在，因此，与for 或since 引出的时间状语连用的句子(或主语)谓语动词必须是持续性的(如上面两句中的动词study 和be) (2) 英语中有些动词的意义不能持续，表示的是一瞬间就结束的动作，这些动词被称为非持续性动词或短暂性动词，常见的如come, leave, go, lose, see, begin, start, arrive, bec ome, die, buy, borrow, close, join, reach, fall, get up 等。这类动词可以用于完成时态，但在肯定句中不能与表示动作延续的时间状语for 或since 短语连用。如：正：He has come back. 他已回来。 误：He has come back for three days. 若要表示“他回来已三天了”这样的意思，可以将动词改为延续性动词，或改变时间状语，或改用别的句型等，如译为： He has been back for three days. (改变谓语动词) He has been back since three days ago. (改变谓语动词) He came back three days ago. (改变时间状语及动词时态) It’s three days since he came back. (改变句型) (3) 非持续性动词用于完成时态，在肯定句中不能与for 或since引出的短语(或句子)连用，但在否定句中是可以的，因为一个非延续性动词一旦被否定即成为状态，而状态总是可以延续的。如：(https://www.wendangku.net/doc/aa14311428.html,) I haven’t seen him for a long time. 我很久没见到他了。 He hasn’t come here for some time. 他有段时间没来了。 I haven’t heard from her since she left. 自他离开以后，我一直没收到她的来信。

专四练习5

Test Twenty Seven 近义词辨析 recall, remember, remind, recollect 这组词都有“(使…)想起”之意。 recall 意为“想起”，强调有意识地去“回忆，回想”，常与can, could等词连用，强调一次性回忆。 remember 表示“想起”，指事物自然地在记忆中出现，不强调努力或意志。 remind 表示“使…想起”，指人受到一定媒介的启发或提醒而慢慢地唤起对往事的记忆，常用在remind sb. of sth.的结构中。

recollect 意为“回想”，指把已经遗忘的事情重新想起，强调回忆过程。 I can’t recall having met him before.我记不起以前曾见到过他。 I suddenly remembered I had left the book in the library.我突然想起我把书忘在图 书馆了。 Your telling me that story reminds me of another.你给我讲的故事使我想起了另一个故事。 She thought back and tried to recollect the exact wording of the letter.她回忆着，试图回想起那封信的准确字眼。 shift, move, remove, transfer 这组词均含有“移动，转移”的意思。 shift 含有“轻易地更动”或出于不正当的动机把罪过“转”到他人身上的意思。

move 应用范围很广，其中主要意思是“从一处移到另一处”。 remove 意为“拿开，移动，消除”，强调离开原来的、正常的地方或职位等做一种新的、有时是暂时的安排或改变。该词还含有把不利的东西“取消”的意思。 transfer 意为“调动，移交”，强调从一处转到另一处。 It’s no use trying to shift the blame to anybody else.想把过错推到别人身上是没用的。 Please help me move the desk to the corner.请帮我把桌子搬到墙角。 The obstacle has been removed; the two countries continued their dialogue.障碍 已经排除，两国又继续对话。 The head office of the company has been transferred to

频度副词的用法

频度副词是副词的一种,在初中阶段常用的有四个,即always, usually, often, sometimes。现将它们的用法归纳如下: 一、频度副词在句中的位置。 频度副词在句中习惯上位于be动词、助动词之后,行为动词之前。如: 1.She is often late for school.她上学经常迟到。 2.He usually goes to bed at about 12.他通常(午夜)十二点钟睡觉。 3. When do you usually get up in the morning?早上你通常什么时候起床？ sometimes是个特殊的频度副词,既可以放在be动词、助动词之后,行为动词之前,也可以放在句首,还可以放在句尾。如: 1. I sometimes think that it is a great mistake.我有时想这是一个大错。 2. Sometimes I help my mother in the house.有时候我帮助妈妈做家务。 often可以放在句中,也可放在句尾,习惯上不放在句首。如: We have been there quite often.我们经常到那儿去。 这些频度副词的位置与句中谓语动词有无助动词有关。句中没有助动词时,副词置于动词be之后,其它动词之前。 二、表示频度方面的区别。 always是频度最大的词,意为"总是；永远"。如: I shall always remember my first day at school.我将永远记住我上学的第一天。 usually意为"通常",即很少例外,频度仅次于always。如: What do you usually have for breakfast?你通常早餐吃什么？ often意为"经常",在频度上不如usually那么频繁。如: Li Ping often does his homework in the afternoon.李平经常在下午做作业。 sometimes意为"有时候",频度比often小,表示动作偶尔发生,间断较大。如: 1.I sometimes go to the library.我有时去图书馆。 2.Sometimes I read a book in the evening.我有时在晚上看书。 三、频度副词与not连用时,表示部分否定；对频度副词进行提问时,要用how often。如: 1. A great scholar is not always a very wise man.大学者未必一定是极聪明的人。 2. We go to the cinema sometimes.(对划线部分提问) How often do you go to the cinema?

practise和practice的区别 二者有什么不同

practise和practice的区别其实非常小，但是正因为两个单词的区别很小，所以有很多同学都不明白二者有什么不同，下面就让小编来告诉大家吧。 practise和practice的不同 应用范围不同，practice比practise的应用范围广。practice有两种词性，既能做动词使用，也能做名词使用。 例句： practice speaking English.练习说英语;do some practice.做一些练习。 practise只有动词词性，用法和意思与practice相同。 例句：practise speaking English.练习说英语。 practise造句 Lauren practises the piano every day. 劳伦每天练习钢琴。 Acupuncture was practised in China as long ago as the third millennium BC. 中国早在公元前3,000年就已开始采用针灸疗法。 There are consistent reports of electrical torture being practised on inmates. 一直有报道称犯人被施以电刑。 In Belgium only qualified doctors may practise alternative medicine. 在比利时只有资质合格的医生才能从事非传统医学工作。

When she wanted to get something right, she would practise and practise and practise. 她想做好一件事的时候，就会练习、练习、再练习。 practice造句 Some firms have cut workers 'pay below the level set in their contract, a practice that is illegal in Germany. 一些公司把工人薪水减至低于合同规定的水平，这种做法在德国是非法的。 She was taking all three of her daughters to basketball practice every day. 她每天都带3个女儿进行篮球训练。 I eventually realized I had to change my attitude toward medical practice. 我终于认识到自己不得不改变对医务工作的看法。 The new doctor's practice was miles away from where I lived. 新开的诊所离我住的地方有几英里远。 In practice, workers do not work to satisfy their needs. 事实上，工人工作并不是为了满足本身的需要。 It is normal practice not to reveal details of a patient's condition. 不透露患者病情的细节是惯常的做法。

频率副词的用法

频率副词的用法 文稿归稿存档编号：[KKUY-KKIO69-OTM243-OLUI129-G00I-FDQS58-

一，.频率副词是表示与次数,频率有关的副词,如: always(总是), usually(通常), often （经常）sometimes(有时), seldom(不常), hardly10%(几乎不) hardly ever(几乎从不) never（从不） once(一次), twice(两次)，等。 Always100%＞usually85%＞often75%＞sometimes20%＞ seldom15%>never0% .二，频率副词在句子中的位置 1，在be动词，情态动词及第一个助动词之后。 Eg, She is always kind to us. I can never forget the day. The work has never been done. 2，实义动词之前 He often goes to school early. 3，有时为了强调，可放在句首。 Sometime I stay at home during the weekend. 三，对这些频度副词提问时，用how often。如： Sometimes I write to my brother. How often do you write to your brother? 四，may be和maybe一分一合，但它们的含义和用法却截然不同。maybe是副词，意思是“也许、可能”，在句中作状语，相当于perhaps，常位于句首。

Maybe she’ll come this afternoon. 她可能今天下午来。 Maybe you put the pen in your bay. 大概你把笔放在包里了。 在may be中，may是情态动词，be是动词原形，两者构成完整的谓语形式，与主语形成系表结构，意为“也许是、可能是”。 I can’t find my watch. It may be in your pocket. 我找不到我的手表了，它可能在你的口袋里。 He may be a soldier. 他可能是军人。

练字 practise calligraphy

练字practise calligraphy 今年一放暑假，妈妈就给我报了练字班。 As soon as the summer vacation is over this year, my mother reports to me for a calligraphy class. 去练字班的第一天，我随便找了一个座位坐下来。然后，老师说：同学们，大家今天是第一次来，大家要互相关照，不要吵架、打骂。记住了吗？大家异口同声的回答：知道了。于是，老师布置了今天的作业，便说：作业写完了，拿来老师跟前，让老师检查作业。嗯。我们说。我写完了作业，拿到老师跟前，老师看了看，说：你写的字太大了；而且横都往下面斜。以后要注意写的字都再小一圈，横往上斜五度。我说：知道了，我会注意这些问题的。 On the first day of the class, I found a seat to sit down. Then, the teacher said: students, today is the first time for us to come. We should take care of each other and not quarrel or scold. Remember? Everyone said in unison, I see. So, the teacher assigned todays homework, then said: the homework has been finished, bring the teacher to the front, let the teacher check the homework. Well. We said. After I finished my

as because for since用法区别

because, as, for, since这几个词都是表示“原因”的连词，语气由强至弱依次为： because→since→as→for;其中because, since, as均为从属连词，引导原因状语从句；而for 是并列连词，引导并列句。 1. because表示直接原因，它所指的原因通常是听话人所不知道的，其语气最强。常用来回答why的提问，一般放于主句之后，也可以单独存在。例如： (1)I stayed at home because it rained. 因为下雨我呆在家里。 (2)Because Lingling was ill, she didn”t come to school. 玲玲因病，没有上学。 (3)�Why is she absent? 她为什么缺席？ �Because she is sick. 因为她病了。 此外，在强调句型中，只能用because。例如： (4)It was because I missed the early bus that I was late for school. 我上学迟到是因为我没有赶上早班汽车。 2. since侧重主句，从句表示显然的或已为人所知的理由，常译为“因为”、“既然”，语气比because稍弱，通常置于句首，表示一种含有勉强语气的原因。例如： (1)Since he asks you, you”ll tell him why. 他既然问你，那就告诉他为什么吧。 (2)Since everyone is here, let”s start. 既然大家都到齐了，我们就出发吧！ (3)Since I understood very littl e Japanese, I couldn”t follow the conversation. 我日语懂得不多，因而听不懂对话。 3. as是常用词，它表示的“原因”是双方已知的事实或显而易见的原因，或者理由不是很重要，含义与since相同，但语气更弱，没有since正式，常译为“由于，鉴于”。从句说明原因，主句说明结果，主从并重。例如： (1)We all like her as she is kind. 我们都喜欢她，因为她善良。 (2)As I had a cold, I was absent from school. 因为我感冒了，所以没去上课。 (3)As Xiaowang was not ready, we went without him. 由于小王没有准备好，我们只好不带他去了。 4. for用作连词时，与because相似，但它所表示的原因往往提供上文未交待过的情况。for 不表示直接原因，表明附加或推断的理由，因此for被看作等立连词，它所引导的分句只能