英语三大从句精编版

复合句

【语法要点】

复合句是由一个主句加一个或几个从句所构成的句子。从句只用作句子的一个成分，不能独立。根据从句在句子中的作用，可分为名词性从句、定语从句和状语从句三类。

（一）名词性从句

名词性从句包括主语从句、表语从句、宾语从句、同位语从句。其关联词有连接词that、if、whether；疑问代词who、what、which和疑问副词when、where、how、why等。

1.名词性从句句法结构：

从

属

连

词that whether 主

语

从

句

That he will come is certain.（that不可省）

Whether she is coming or not doesn’t matter too much.

（不能用if）

宾

语

从

句

I think（that）he will be all right in a few days.

I went in and asked if（=whether）they had a cheap suit.

I wonder whether（不能用if）it is true or not.

表

语

从

句

The fact is（that）I have never been there.

The question is whether（不能用if）it is worth doing.

同

位

语

从

句

The fact that she had not said anything surprised all of us.

They asked me the question whether the work was worth doing.

连接代词

that who whom whose which 主

语

从

句

Who will help him is not known.

What he said is very important.

Which side will win is not clear.

宾

语

从

句

（1）作及物动词的宾语。例如：

I really don’t know what he is doing.

Do you know who/whom they are waiting for?

He asked whose dictionary it was.

He can’t tell which method they will use for the experiment.

（2）作介词的宾语。例如：

Pay attention to what the teacher said.

I wondered to whom he had given the letter.

表

语

从

句

That is what he is worried about.

The question is who will come here.

The question is which team will win the match.

连接副词

where when why how 主

语

从

句

Where she has gone is not known yet.

When they will start is not known yet.

Why he did it wasn’t quite clear.

How he became a great scientist is known to us all.

宾

语

从

句

I don’t know where we are going to have the meeting.

Please tell me when we shall discuss our work plan.

Do you know why he said that?

Will you tell me how I can get to the railway station? 表

语

从

句

That is where he was born.

This is why he is late.

This is how he did it.

The question is when he will be back.

同

位

语

从

句

I have no idea when he will come back.

You have no idea how worried I was.

The problem is where we can get so much money.

2.名词性从句的其它用法：

1）if不能引导表语从句。连接代词who、what、whose、which不能引导同位语从句。

2）有时as、as if/though、because也可以引导表语从句，能跟表语从句的谓语动词一般为系动词be、seem、look等。例如：

Things are not always as they seem to be.事情并不总是像表面上看来的那样。

It looks as if it were going to rain. It is because you eat too much.

3）介词宾语不可以用which来引导，而要用what来引导。例如：

We can learn what we did not know. He will talk to us about what he saw in the U.S.

4）连词that引导的名词性从句除能用在except、but、in后之外很少作介词的宾语，。其它一些介词的宾语从句如果由连词that引导，则需用it先行一步作形式宾语。例如：

He is a good student except that he is careless.

You may depend on it that they will support you.

5）若主句谓语动词是及物动词make、find、think、see、hear等，则把宾语从句置于宾语补足语之后，用it作形式宾语。例如：We find it necessary that we practise spoken-English every day.

6）某些作表语的形容词或过去分词后常接宾语从句，如sure、happy、glad、certain、pleased、afraid、surprised、satisfied等，连词that可省略，有的语法书称之为状语从句。例如：

I am sure that he will succeed.

I am afraid you don’t understand what I said.

Mother was very pleased her daughter had passed the exams.

7）连接代词whoever、whatever、whichever也可引导宾语从句。例如：

I will show you whatever you want to see.

You may choose whoever you like. I will take whichever fits the sockets.（插座）

8）同位语从句一般跟在某些表示抽象概念的名词后面，用以说明名词所表示的具体内容。常跟同位语从句的名词主要有：idea、news、fact、promise、answer、belief、condition、doubt、fear、hope、order、problem、proof、question、reply、report、suggestion、thought、truth等。

由连词that引导同位语从句既无语法功能，也无词汇意义，只是引导词；由连词whether引导同位语从句无语法功能，但有词汇意义“是否”；由连词when、where、how引导同位语从句在句中分别作作时间、地点和方式状语。

注意→①关联词只能用whether不能用if表示“是否”的情况如下：

A)在表语从句和同位语从句中。例如：

The question is whether the film is worth seeing.

The news whether our team has won the match is unknown.

B)在主语从句中，只有it作形式主语时whether和if均可。否则，也只能用whether。例如：

Whether we shall attend the meeting hasn’t been decided yet.

It hasn’t been decided whether/if we shall attend the meeting.

C)在介词之后（介词往往可以省略）。例如：It all depends (on) whether they will support us.

D)后面直接跟动词不定式时。例如：He doesn’t know whether to stay or not.

E)与or not连用时。例如：We didn’t know whether or not she was ready.

②关联词if、whether均可使用的情况如下：

A)引导宾语从句，但当宾语从句是否定句时，一般用if引导。例如：

I wonder if/whether the news is true or not. I don’t care if it doesn’t rain.

B)在“be+形容词”之后。例如：He was not sure whether/if it is right or wrong.

③用if引导宾语从句如果会引起歧义，应避免使用if而用whether。试比较：

Please let me know if you want to go. Please let me know whether you want to go.

（if从句既可理解为宾语从句，也可理解为条件状语从句）

doubt作“怀疑”解接宾语从句时，主句为肯定句用whether或if，主句为否定句或疑问句用that。

10）it作形式主语

①that所引导的主语从句常由代词it作形式主语。且wh-系列引导词引导的从句均可。例如：

It makes everyone happy that the girl is still alive.

It doesn’t matter too much whether he’s coming or not.

It is still open to question who is to head the group. 谁领导这个小组还没定下来。

②常以it作形式主语的句型有：

—It +be+形容词(obvious、true、natural、surprising、good、wonderful、funny、possible、likely、certain、probable)+that从句

—It +be+名词词组(no wonder、an honour、a good thing、a pity、no surprise)+that从句

—It +be+过去分词(said、reported、thought、expected、decided、announced、arranged)+that从句—It +seem、happen等不及物动词及短语+that从句

—It +doesn’t matter(makes no difference, etc)+连接代词或连接副词引导的主语从句

—当that引导的主语从句出现在疑问句中时，也要以it作形式主语，而把主语从句后置。

例如：Is it true that the scientist will give us a lecture next week?

（二）定语从句

在复合句中修饰名词或代词的从句叫定语从句。被修饰的名词或代词叫先行词。引导定语从句的关系代词有who、whom、whose、which、that等和关系副词where、when、why等。关系代词和关系副词在定语从句中担任句子成分。而引导引导非限定性定语从句的关系代词有who、whom、whose、which、of which等，这些关系代词都不能省略，通常不用关系代词that。例如：

I have two sisters, who are both students.

关系词who which that whose where when 指代人物、地点等动物、物、地点等所有者地点时间

例如：

This is the man who helped me. They have a dog whose barking drives me mad.

I know the reason why he came late. This is the place where we lived for 5 years.

I will never forger the day when I met Mr. Liu.

The doctor whom you are looking for is in the room.

注意→先行词表示地点时，有时用where，有时用that引导定语从句。这时要根据从句的谓语动词是及物的还是不及物的，是及物的就用that(which),否则就用where。例如;

This is the house where he lived last year.

This is the house that (which) he visited last year.

关系代词which、who或that在限定性定语从句中作宾语时可省略。例如：

Amsterdam is the place we like most.

They are looking for a person (who) they can rely on.

在定语从句中，若先行词指人，其关系代词可用who、whom，也可用that。例如：

The girl who/that is speaking at the meeting is our monitor.

在下列情况下多用或须用who。

①关系代词在从句中作主语时。例如：

The doctor who treated me was very experienced. 给我治病的医生是很有经验的。

②先行词为all、anyone、one、ones、those、people等时。例如：

All who heard the news were excited. 所有听到这消息的人都感到兴奋。

Those who want to go please sign their names here. 想去的人请在这里签名。

④在非限制性定语从句中。例如：Tom’s father, who is over sixty, still works hard.

⑤在被分隔的定语从句中。例如：A new teacher will come tomorrow who will teach you German.

⑥在以there be开头的句子中。例如：There is a strange who wants to see you.

⑦一个句子中带有两个定语从句，其中一个关系代词是that，另一个须用who。例如：

The student who was praised at the meeting is the monitor that is very modest and studied very hard. 在会上受到表扬的学生是班长，他谦虚好学。

whose引导定语从句应注意以下几点：

①whose引导定语从句，其先行词不仅可以指人，还可以指物。例如：

It was a meeting whose importance I didn’t realize at the time.

②whose在定语从句中可与它修饰的名词一起作介词宾语，与介词放在先行词与从句之间。例如：

The boss in whose department Mr. King worked had heard about the accident.

Tom, on whose bike I went to school is a friend of mine.

③whose的先行词指物时，可用of which代替whose，但词序不同。例如：

The novel whose title is Red and Black is very interesting. (=the title of which)

2.介词+关系代词中介词的选择

介词的选择要看三方面：一要看和先行词是否搭配；二要看和定语从句中谓语动词是否搭配；三要根据定语从句的意义来选择。例如：

This is the car by which I went to Jinan. (by car)

Tomorrow we will have a meeting at which we will discuss some problems. (at the meeting)

The student to whom I spoke has gone home. (speak to)

3.which和that引导定语从句的区别

which在从句中作主语或谓语动词及介词的宾语。that在定语从句中可以指人或物，在从句中作主语或谓语动词的宾语。但不能放在介词后面作介词宾语。例如：

This is the book which you want.

The building which stands near the river is our school.

The room in which there is a machine is workshop.

The letter that I received was from my father.

（1）只能用which不能用that的情况

①引导非限制性定语从句。

②关系词在从句中作介词宾语且位于介词之后。例如：This is the house in which I once lived.

（2）用that的情况

①先行词既有人又有物时

②先行词为不定代词修饰时（all、few、little、much、something、nothing、anything等）

③先行词前有形容词最高级或序数词所修饰时

④先行词被all、any、every、few、little、no、some等修饰或被the only、the very、the same、the last、just等修饰时

⑤关系代词在从句中作表语时

⑥there be结构

例如：

All that we have to do is to practise every day.

The first lesson that I learned will never be forgotten.

I have read all the books (that) you gave me.

He is the only person that I want to talk to.

They talked of things and persons that they remembered in the school.

The village is no longer the one that used to be.

注意→whom、which作介词宾语时，介词一般可放在which之前，也可放在原来的位置上，在有介词的动词固定词组中，介词只能放在原来的位置上。例如：

This is the person whom you are looking for.

当主句是以who或which开头的特殊疑问句时，定语从句须用that，以免与先行词重复。

例如：Who is the boy that was here just now?

4.as引导的定语从句

1)as用作关系代词和关系副词引导限定性定语从句，并在从句中作定语、表语或状语，构成the sam e…as,such…as等结构。例如：

I like the same book as you do.(as作宾语)

I shall do it in the same way as you did. (as作状语)

2)as引导非限定性定语从句。as在定语从句中作主语、表语或宾语，这个定语从句是说明整个句子，位置可前、可中、可后，意为“正如、好像”。例如：

Such stamps as you have collected are very valuable.

As we all know, he studies very hard.(as作宾语) They remarried, as we had expected.

常用的这种类似插入语的句式有as is said above,as is known to all,as it is等。

注意→①关系代词在从句中作主语时，从句的谓语动词的人称和数必须和先行词保持一致。

②关系代词which和as在定语从句中的区别是：which不能放在句首，而as则可以；在句中时，as有“正如”、“就像”之意，而which则没有。

同位语从句与定语从句的区别：

定语从句是形容词性从句，引导词是关系词，关系词代替先行词的意思在定语从句中作成分；同位语从句是名词性从句引导词是连接词，that、whether、if在句中不作任何成分，连接代词和连接副词本身意义在同位语从句中作成分。例如：

A. The news that they had won the game arrived soon.

（同位语从句）（the news和that they had won the game无逻辑关系）

B. The news that you told me yesterday is true.

（定语从句）（the news在从句中相当于told的逻辑宾语）

（三）状语从句

状语从句在句中作状语，修饰主句中的动词、形容词或副词等。状语从句放在主句之前时，常用逗号隔开；放在主句之后，一般不用逗号。

1.状语从句分类及其常用连词：

类别常用连词

时间状语从句when、while、as、before、after、since、until（till）、once、as soon as等

地点状语从句where、wherever等

原因状语从句because、since、as、now that等

目的状语从句so、so that、in order that、in case、lest、for fear that等

结果状语从句so that、s o…that、suc h…that等

条件状语从句if、unless、as/so long as、on condition that、in case、once、provide that等

让步状语从句though、although、even if/though、as、when、while、no matte r…等

比较状语从句a s…as、not so…as、than、the more…the more…等

方式状语从句(just)as、as if/though等

2.引导状语从句的常见连词用法

◆when, while和as

（1）when引导的时间从句中的动词既可以是延续性动词，也可以是非延续性动词。

（2）while引导的时间从句中的动词通常是延续性动词。

（3）as引导的时间从句中的动词是延续性动词时，则侧重表示从句的动作和主句的动作同时发生，意为：一边……一边……。例如：I was fat when I was a child.

When the film ended, people rushed out of the hall.

He took a bath while I was preparing dinner.

He sang songs as he was taking a bath.

注意→1）when可以作并列连词，用以连接并列句，意为：这时突然……。常构成下列句式：

①was/were doin g…when…正在……突然……。例如：

I was working in the garden when it began to rain.

②be about to do…when…正要……突然……。例如：

We were about to go out when the rain poured down.

③be on the point of doing…when…正要……突然……。例如：

I was on the point of going out when the telephone rang.

2）when还可引导原因状语从句，意为：既然，考虑到，相当于since，considering that。例如：How can they learn anything when they spend all their spare time watching TV?

3）while也可作并列连词，意为“然而”。例如：Mum was sewing while dad was watching TV.

4）while还可引导让步状语从句，意为“尽管”。

例如：While I admit his good points, I can see his shortcomings.

◆till与until

（1）till与until意思相同，只是till一般不放在句首。、

（2）主句的谓语动词如果是延续性动词，主句要用肯定式，意为：直到……为止。

（3）主句的谓语动词如果是非延续性动词，主句要用否定式，意为：直到……才……。

（4）在“It is not until…that…”（直到……才……）句型中，要用until不用till。

（5）not until置于句首时，句子需要部分倒装。

例如：I will stay here until/till the rain stops. He didn’t go to bed until/till I came back.

It was not until I came back that he went to bed. Not until I came back did he go to bed.

◆before与since

（1）before引导的从句中一般不用否定式谓语，常用句型有：

①It was/will be+时间段+before…。

②It was not/won’t be+时间段+before…。

例如：It was long before I came. It was not long before he told me about this affair.

（2）since后的动词不同，起算的时间也不同。

①since+非延续性动词的过去式，从该动作发生时算起

②since+延续性动词的过去式，从该动作结束时算起

例如：It is two years since he joined the army. It is two years since he was a soldier.

◆because、now that/since、as与for

区别

项目

位置内涵语气能否回答why能否被强调because 主句前或后直接因果关系强能能

as 主句前或后

双方都知道的原因弱不能不能

since/now

that既然

主句前

for 并列连词，句中间接的、推断的

原因

最弱不能不能

例如：

As it is raining, we shall not go to the park.

Now that everybody is here, let’s begin our meeting.

He must be ill, for he is absent today. It is because he was ill that he didn’t go with us.

◆although、though与as

1）三者都可以引导让步状语从句，although引导让步状语从句时用正常语序，though可用正常语序也可用倒装语序。as必须用倒装语序，从句中的表语、状语或动词原形置于句首；若表语是名词，前置要省略冠词。例如：

He is unhappy, though/although he has a lot of money.

Difficult as/though the task was, they managed to finish it in time.

Child as/though he is, he knows a lot.

2）though和although在引导让步状语从句时不可与but连用，但可以和yet连用。例如：

Although/Though it was raining hard, yet they went on playing football.

3）though还可作副词，意为“可是，然而”。置于句末。例如：

He said he would come; he didn’t, though.

4）even though/if引导的让步从句中视具体情况可用陈述语气或虚拟语气。例如：

Even though/if it is raining, we’ll go there.（陈述语气）Even if I were busy, I would go.（虚拟语气）◆whethe r…or…（不管……还是……）以及疑问词+ever与no matter+疑问词（不管/无论……），也可引导让步状语从句。例如：

Whether you believe or not, it is true.

Whatever（=no matter what）you say, he won’t believe you.

Whoever you are（=no matter who you are）, you must obey the rules.

◆unless与if not

很多情况下，两者可换用。例如：You will be late unless you hurry/if you don’t hurry.

在下列结构中，unless与if not不可相互替代。

（1）当if not引导非真实条件句时一般不可用unless。例如：

If Henry hadn’t been tended carefully, he couldn’t have lived so long.

（2）unless表示除外的唯一条件，因此常不用and连接两个unless从句，而if not不受此限制。

例如：If you don’t eat fresh vegetable and you don’t have enough exercise, you won’t keep it.

（3）unless从句中可用否定词，if not从句中不可再用一个否定词→I will go unless no one else does. （4）在if not从句中，常用any、yet、either、at all等非肯定词，而在unless从句中常用some、already、still、too等肯定词。例如：

I will be angry if you haven’t spoken to her yet.

I will be angry unless you have already spoken to her.

◆as/as if/as though

as/as if/as though都可引导方式状语从句，其中as if或as though引导的从句一般用虚拟语气，但如果从句中所叙述的情况很可能实现，也可用陈述语气。例如：

Do as you are told to, or you will be fired. The old lady treats the boy as if he were her own son.

◆in order that与so that

二者都可引导目的状语从句，in order that引导的目的状语从句可置于句首，但so that在引导目的状语从句时不可置于句首。例如：

He got up early so that/in order that he could catch the first bus.

In order that he could catch the first bus, he got up early.

除此之外，for fear that、in case与lest也可引导目的状语从句，从句谓语动词要用（should）+动词原形。

◆s o…that与such…that

二者都可引导结果状语从句，注意其结构形式的区别：

so+形容词/副词+that从句

so+形容词+a/an+可数名词单数+that从句

so+many/much/few/little+名词+that从句

such+a/an+形容词+可数名词单数+that从句

such+形容词+可数名词复数/不可数名词+that从句

例如：Mike is such an honest worker that we all believe him.

=Mike is so honest a worker that we all believe him.

试比较：It is not surprising that such little worms eat so little grain.

除此之外，so that从句也可引导结果状语从句，但从句中一般没有can、could、may、might等情态动词。例如：He got up early so that he caught the first bus.

3.当主句用一般将来时，时间状语从句、条件状语从句用一般现在时表示将来。

例如：He will play football as soon as he finishes his homework.

注意→除了as soon as表达“一……就……”之外，还有immediately、directly、instantly、the moment、the minute、the instant、no sooner…than、hardly/scarcely…when…等。但no sooner与hardly引导的句子的谓语动词应用过去完成时，而than与when引导的句子的谓语动词应用一般过去时，此外，当把no sooner和hardly/scarcely提到句首时，应用倒装语序。例如：The moment I heard the voice, I knew father was coming.

No sooner had we arrived at the station than the train left.

The boy burst into tears immediately he saw his mother.

4.注意比较状语从句

1）比较状语从句常由a s…as、not so（as）…as、than来引导，且常常省去与主句中相同的部分，只留下相比较的部分。例如：

She looks far older than she is.

It’s generally more expensive to travel by plane than by train.

2）比较状语从句中应注意被比较内容的一致。例如：

The weather here is hotter than that（=the weather）in your hometown.

不可说：The weather here is hotter than your hometown.

3）表示A不及B时，常用句式如下：

①A+谓语的否定式+adj/adv的比较级+than+B

②A+谓语+less+adj/adv的原级+than+B

③A+谓语的否定式+so/as+adj/adv的原级+as+B

例如：Bob doesn’t run faster than his brother.

I am less tall than he. Mrs. Brown is not so fat as she looks.

4）表示A与B同等程度的比较，常用“A+谓语+as+adj/adv的原级+as+B”。例如：

The ruler is as long as yours.

He has bought as many books/much rice as I have.

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高一英语定语从句讲解精华版

定语从句 一、基本概念： 定语： 定语从句： Do you know the man who spoke at the meeting just now That is the house where he lived ten years ago. 引导词：关系词 关系代词有：that, who, whom, whose, which; 在从句中充当： 关系副词有：when, where, why. 在从句充当： 先行词： 定语从句中引关系词的作用： 二、关系词的用法： （一）关系代词的用法： 1． He is the man lives next door. The train has just left is for Shenzhen. 2． The man ________ we have just seen is a famous writer. Where is the book ___________I bought last week （二）关系副词的用法： 1． I still remember the time ________I first became a college student. Do you know the date __________Lincoln was born

(三) 使用关系副词应注意下列几点： 1．这三个关系副词在意义上都相当于一定的介词+which结构： when = on (in, at, during…) + which; where = in (at, on…) + which; why = for which. 如： I was in Beijing on the day when (=on which) he arrived. The office where (=in which) he works is on the third floor. This is the chief reason why (=for which) we did it. 2．当先行词是表时间的time, day等和表地点的place, house等时，一定要注意分析从句的结构，如果缺少主语或宾语时，关系词应该用which或that, 缺少时间状语或地点状语时，才能用when或where，试比较： I’ll never forget the day _________ my hometown was liberated. I’ll never forget the days____________we spent together last summer. His father works in a factory____________radio parts are made. His father works in a factory______________makes radio parts. 三．限制性定语从句与非限制性定语从句 1．限制性定语从句 This is the telegram which he refers to. Is there anything (that) I can do for you 2．非限制性定语从句 This note was left by Tom, who was here a moment ago. As a boy, he was always making things, most of which were electric.

初中英语三大从句总结

一. 宾语从句object clause： 一. 定义definition： 在句子中起宾语作用的从句叫做宾语从句。 二. 连接词connections： that: I think that you can pass the exam. Whether/if: I don’t know what the word means. “Wh”: I don’t know what the word means. I don’t know where he found the book. 只用whether的情况： 1. 与or not连用： I don’t know whether it’s raining or not. 2. 与动词不定式连用： He doesn’t know whether to accept the invitation. 3. 连接词前有介词时： It depends on whether he is coming. 三. 时态tenses: 1. 主句是一般现在时态，从句根据实际情况而定(各种时态均可) She wants to know what he has done for the exam. 2.主句是一般过去时态，从句用相应的过去的时态。 1）She said that she was a student. 2）She said that she would fly to Japan in a week. 3）She said that she had finished her homework already. 3. 如果宾语从句说的是客观真理、自然现象或事实时，这时宾语从句要用一般现在时态。 The teacher said that the earth goes round the sun. 二. 定语从句Attributive clause： 1.定义：在复合句中修饰名词、代词的从句叫定语从句 2.先行词指人who /that 先行词指物which/ that 3. 定语从句一般紧跟被修饰的名词或代词（即先行词）后 4.关系代词代替先行词在句子中担当成分，所以从句中不可再出现其他代替先行词的代词 5.翻译方法“…. 的” Eg. 1. Yesterday we bought a book which is really hard to understand. 2. The students who are from Maple Leaf School like learning English. Whom: 先行词指人，则代替先行词在定语从句中充当宾语（包括介词的宾语）, 与who的区别是如果前面带介词则必须用whom 1.This is the teacher whom\who we like best. 2. I don’t like the boy to whom you are talking. Whose : 指人或物，作定语，表示“…的” eg: Harry is the boy whose mother is our math teacher.

2020年高考英语二轮复习：并列句和三大从句(含答案)

第五讲并列句和三大从句 第一组定语从句 1.(2020辽宁大连双基测试，)The 55-km Hong Kong Zhuhai-Macao Bridge, ____________________was opened on Oct. 24, 2018connects Guangdong Province with China's two special administrative regions, Hong Kong and Macao. 2.(2020黑龙江哈尔滨三中二调，)In 1984,Dr.Mary Groda-Lewis, ____________________was thirty-five years old then, graduated with honors and realized her dream 3.(2020陕西咸阳)He said,"...I added a small moustache____________________would add age without hiding my expression." 4.(2020新疆乌鲁木齐二诊)The act,____________________forbids trading, was passed in 1448 and is still in force. 5.(2020陕西汉中一模，41)Our office wasn't far from Chinatown,____________________ I found some very good Chinese restaurants 6.(2020黑龙江大庆一中)As more and more people own private cars, parking has become a big headache for many car owners, especially for those____________________ live in downtown areas without enough parking spaces. 7.(2019黑龙江哈尔滨六中二模，61)Now millions of fans are eagerly awaiting its eighth and final season,____________________starts on April 14. 8.(2018陕西宝鸡质检，65)Then,a fire,____________________broke out in1969 on Cleveland's Cuyahoga River, shed light on the problem of chemical pollution in water. 【答案】 1.which 句意：长55公里的港珠澳大桥于2018年10月24日开通，它将广东省与中国的两个特别行政区——香港和澳门——连接起来。设空处引导定语从句，指代先行词The 55-km Hong Kong-Zhuhai-Macao Bridge,关系代词在从句中作主语，故填which。 2.who 句意：1984年，Mary Groda-Lewis博士以优异的成绩毕业并实现了自己的梦想，当时她35岁。先行词为Dr.Mary Groda-Lewis,设空处引导非限制性定语从句，在从句中作主语，故填关系代词who。 3.which 句意：他说：“……我增加了一小最胡子，这会在不掩盖表情的情况下让我看起来年龄大些。”分析句子结构可知，设空处引导非限制性定语从句，先行词为a small moustache,故用关系代词which。 4.which 句意：这项禁止贸易的法令于1448年通过，至今仍然有设空处指代先行词Theact,故由which引导