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语法专题指南
专题九 复合句
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专题九 复合句
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专题九 复合句
构成规则及用法 示例
连接词 由that引导,that无实义,可省略 I feel (that) time is more important.
由if/whether引导,意为“是否”,不作句子成分,不能省略,句尾有or not时用whether Laura asked the teacher if she could hand in the paper tomorrow.
由连接代词who,whom,what,which和连接副词when,where,why,how引导,在句中作某种成分,不能省略 I don’t know who/whom she is waiting for.
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专题九 复合句
语序 从句一律使用陈述语序 Can you tell me what you did just now?
时态 主句为一般现在时、一般将来时,从句根据实际情况使用所需时态 She wants to know where we are going.
主句为一般过去时,从句应用相对应的过去的某一时态 He asked if I had read the book.
从句陈述内容若为客观真理、自然现象或科学原理时,无论主句是什么时态,从句用一般现在时 Our teacher told us that the moon is smaller than the earth.
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专题九 复合句
注意:
疑问句+动词不定式
此结构中的疑问句,包括疑问代词what,which和疑问副词how,when,where等。这些疑问词和不定式一起构成了不定式短语,可在句子中作主语、宾语、表语等。
如:
Excuse me,could you please tell me how to get to the bookstore?
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专题九 复合句
二、定语从句
在复合句中作定语,修饰主句中某一名词或代词的从句,叫作定语从句。
结构:先行词+关系词+定语从句
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专题九 复合句
用法 示例
that 指物、人;在从句中充当主语(不可省略)、宾语(可省略) A plane is a machine that can fly.
which 指物;在从句中充当主语(不可省略)、宾语 My mother works in a factory which makes clothes.
who 指人;在从句中充当主语(不可省略)、宾语(可省略)、表语 Sam likes the musician who plays different kinds of music.
whom 指人;在从句中充当宾语(可省略),有时也可以用who替代 I know the boy whom you were talking with.
whose 指物、人;在从句中充当定语 They live in a room whose window opens to the south.
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专题九 复合句
注意:
关系代词只能用that,不能用which的情况
①先行词是不定代词时。如:
As we all know,all that can be done has been done.
②先行词被the only,the right,the last等修饰时。如:
It is the only word that I don’t know in the passage.
③先行词既有人又有物时。如:
The characters and events that the author describes in his book are very interesting.
④先行词有序数词或形容词最高级修饰时。如:
He was the first man that gave us some useful advice.
⑤当主语是以who或which开头的特殊疑问句时。如:
Who is the man that is standing over there?
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专题九 复合句
三、状语从句
一个句子(从句)作另一个句子(主句)的状语,作状语的句子叫状语从句。状语从句由从属连词引导,从属连词不充当句子成分,只起连接作用。
连词 意义 示例
时间状语从句 when 当……时 I feel very happy when you come to see me.
while While Linda was sleeping,Jenny was cooking.
as He smiled ashe passed.
before 在……之前 She wants to see you before you go.
after 在……之后 You need to brush your teeth after eating.
till/until 直到……为止 I’ll wait till/until he arrives.
since 自从…… He has lived here since he was born.
as soon as 一……就 I’ll call you as soon as I get to Beijing.
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地点状语从句 where 在哪里 Where there is a will,there is a way.
wherever 无论在哪儿 Wherever did you get that idea?
条件状语从句 if 如果 If he has time tomorrow,he will come to the meeting.
unless 除非,如果不 I always forget things easily unless I write them down.
as long as 只要 As long as you work hard,you will succeed one day.
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专题九 复合句
让步状语从句 though/
although 虽然,尽管 I have chicken for lunch,though I don’t like it.
Although it rained hard,he still went out.
evenif/though 即使 Even though I have enough time,I don’t want to go there with him.
原因状语从句 because 因为 He didn’t go to school because he was ill.
since 既然 Since he says so,it must be true.
as 因为,由于 As I’m not at home,please leave a message.
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结果状语从句 so…that… 如此……
以至于…… She is sotired that she can’t go any farther.
such…that… It’s such a fine day that many people go out for fun.
目的状语从句 so that 以便,为了 They hurried so that they could get there on time.
in order that 为了 We get up early in order that we can start at 7:00.
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专题九 复合句
比较状语从句 than 比 Mike is taller than you.
as…as… 和……一样 Can you run as fast as Mike?
方式状语从句 as 像,如 We did as the teacher said.
as if/though 好像 I don’t feel as if I belong here.
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专题九 复合句
注意:
在常见的时间状语从句和条件状语从句中,主句和从句的时态一致问题遵循以下3个原则
①主将从现:主句用一般将来时,从句用一般现在时表将来。如:
We will go for a picnic if it doesn’t rain tomorrow.
②主情从现:主句中有情态动词,从句使用一般现在时表将来。如:
You can keep the book if you return it on time.
③主祈从现:若主句是祈使句,从句用一般现在时表将来。如:
Be careful when you cross the road.
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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专题九 复合句
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