用适当的从属连词或词组填空。下列词汇供选用。
when,as,while,since,because,till,until,before,so that,in order that,
though,although,whatever,if,unless,no matter,what,where
1.__________we were still laughing,the teacher came in.
2.__________he stood up,he dropped the glass.
3.He hurried home,looking behind__________he went.
4.__________we got to the cinema,the film had begun.
5.__________the days went on,the weather got worse.
6.Put the book__________it was.
7.__________I could stop him,he had rushed out.
8.It will be five years__________we meet again.
9.It is ten years__________I came to this town.
10.I didn't know the fact__________I read your letter.
11.__________he hadn't worked hard,Tom failed in the examination.
12.__________it is late,we'd better go home.
13.__________everybody is here,let's begin our meeting.
14.He came in quietly__________he might not wake up his wife.
15.You will make proGREss__________you work hard.
16.You will never make proGREss__________you work hard.
17.__________he is very tired,he works on.
18.__________what she says,I won't believe her.
19.We will finish the work on time,__________happens.
20.Study hard__________Lenin did.
参考答案及详解
1.As/When/While
2.When/As
3.as
4.When
5.As。 when,as,while引出的从句谓语是持续性动作时,三者可互换。when的使用范围较宽,既可表示比从句早或晚的动作也可表示与从句同时发生的动作,可指“点时间”,也可指“段时间”。as表示与主句同时的动作,指“点时间”时可与when互换;指“段时间”若强调与主句的动作“平行”,则不能换其他连词。while只指“段时间”,多表示在范围较大的“某一期间”,引导持续的动作;若仅表示“与主句同时”,可与when,as互换。另外,不论主句还是从句,只要一方用了完成时态,只能用when引导主句(题4)。题5中as表“随着”。
6.where。引导地点状语从句。
7.Before。表“还未来得及,就……”。
8.before。“It will be some time before....(要过一段时间……才……)”句型。
9.since。
10.till/until/before。
11.Because。
12.As。
13.Since。
14.so that/in order that此处引导目的状语从句。
15.if
16.unless。均引导条件状语从句,从句中用一般现在时代替一般将来时。
17.Although/Though
18.No matter
19.no matter what或whatever,均引导让步状语从句。
20.as。此处表“如,像,按照”。
