内容正文:
连词
高频考点
when 当…时
The students were talking when the teacher came in.
while 当…时
I was doing my homework while my father was watching TV.
after 在…之后
I’ll go to play football after I finish my homework.
before 在…之前
Please turn off the light before you leave the room.
till,until 直到…为止 不到…不
I’ll wait till/until he arrives.
She won’t get home till/until it gets dark.
as soon as一…就
I’ll call you as soon as I get to Beijing.
since 自从…
He has lived here since 1980.
because 因为
He didn’t come because he was ill.
since 既然
Since we have got ready for it, let’s set off.
as 因为
As I’m not at home, please leave a message.
though/although 虽然
He would be happy though he should have to live alone.
He often helps others although he is not rich.
并列关系
表示转折
表示选择
(1) and可以用来连接两个或两个以上的单词、短语或句子,表示一种顺接的关系。
例:My father bought me a present, and I like it very much.
(2) both…and…可用来连接两个并列的主语、谓语、宾语、表语和状语等。
连接两个并列的主语时谓语动词通常用复数形式。
例:Both you and I are league members.
(3) not only… but also…,,neither…nor…都能连接两个相同的句法单位,如主语、谓语、宾语等。当它们连接两个并列主语时,谓语动词就近原则。
例:He is not only tall but also strong.
(4) as well as 语意同not only… but also…,意为“除了,还有”。但not only… but also…强调的是后者,而as well as强调的是前者。
且当as well as引导并列主语时,谓语动词的数与前面的主语保持一致。
表示因果
but但是;while而;however然而”;though(although)虽然等 .
例:Lucy likes red while Lily likes white.
either…or…“不是…就是…” 通常引导两个相同的句法 单位,当连接两个并列主语时,谓语动词用就近原则。
例:Either he or she is going to help you.
so(所以),for(因为)。 for引导的句子往往放于主句之后,用逗号隔开。 例:
Kate was ill, so she didn’t go to school.
I have to stay up late, for I have lots of homework to do.
1. if意为“是否”时,引导宾语从句;意为“如果”时,引导条件状语从句。
例:Could you tell me if they’ ll come tomorrow?
2. 从属连词so…that…和such…that…都表示“如此…以至于…”,但用法不同:
so…that…结构中的so为副词,后跟形容词或副词;such…that…中的such为形容词,后接名词(名词前可以有形容词或副词修饰)。
例:He was such a clever boy that he thought out a very good idea.
= He was so clever a boy that he thought out a very good idea.
1. but “但是”,用来表示转折