Unit 4 Growing up 重点语法:时间状语从句(八大题型,100题)精讲练-2024-2025学年九年级英语上册重难点讲练全攻略(牛津译林版)
Unit 4 Growing up
重点语法:时间状语从句(八大题型,100题)精讲练
目录
1. 引导时间状语从句的连词
从属连词 | 用法 | 例句 |
While | "与……同时,在……期间",从句常用延续性动词或表示状态的词 | Don’t talk loud while(as)others are working. 别人工作时,请勿大声说话。 |
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When | "当……时",表示主句的动作和从句的动作同时或先后发生,从句的动词可用延续性动词,也可用非延续性动词 | It was raining when we arrived. 我们到达时,天正下着雨。 when you read the poem a second time, the meaning will become clearer to you. 当你再读一遍这首诗,你就会更清楚它的含义。 |
As | "正当,一边……一边,随着",表示两个动作同时发生或某事发生时,另一个动作发生了 | As time went on, his theory proved to be correct. 随着时间的推移,他的理论被证明是正确的。 |
Till/Until | 用于肯定句时,表示"直到……为止",主句必须为延续性动词;not...until/till表示"直到……才",主句常用短暂性动词 | We shall wait until/till he comes back. 我们将一直等到他回来。 I didn’t leave until/till she finished her homework. 直到她完成作业我才离开。 |
Since | "自……以来",主句用一般现在时或现在完成时,从句用一般过去时 | I have heard lot of good things about you since I come back from abroad. 自从我从国外回来,我已经听许多好的事情。 |
Before | 在……以前 | He must finish all the work before he goes home. 回家之前他必须完成所有的工作。 |
After | 在……之后 | Let’s play football after school. 放学后我们打篮球吧。 |
2. when,while,as引导时间状语从句的区别
when,while,as显然都可以引导时间状语从句,但用法区别非常大。
① when可以和延续性动词连用,也可以和短暂性动词连用;而while和as只能和延续性动词连用。
② when从句的谓语动词可以在主句谓语动作之前、之后或同时发生;while和as从句的谓语动作必须是和主句谓语动作同时发生。
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a. 从句动作在主句动作前发生,只用 when。
When he had finished his homework, he took a short rest. (finished先发生)
当他完成作业后,他休息了一会儿。
b. 从句动作和主句动作同时发生,且从句动作为延续性动词时,when,while,as都可使用。
①When / While / As we were dancing, a stranger came in. (dance为延续性动词)
当我们跳舞时,一位陌生人走了进来。
②When / While / As she was making a phonecall, I was writing a letter. (make为延续性动词)
当她在打电话时,我正在写信。
c. 当主句、从句动作同时进行,从句动作的时间概念淡化,而主要表示主句动作发生的背景或条件时,只能用 as。这时,as常表示"随着……" "一边……,一边……"之意。
As the time went on, the weather got worse. 随着时间的过去,天气变得更糟糕了。
d. 在将来时的从句中,常用when,且从句要用一般时代替将来时。
You shall borrow the book when I have finished reading it.
在我读完这本书后,你可以借阅。
③ when用于表示"一……就……"的句型中(指过去的事情)。
sb. had hardly(=scarcely)done sth. when. . . =Hardly / Scarcely had sb. done sth. when...
I had hardly / scarcely closed my eyes when someone knocked at the door.
=Hardly / Scarcely had I closed my eyes when someone knocked at the door.
我刚一闭上眼,就有人在敲门了。
I had hardly / scarcely entered my room when the telephone rang.
=Hardly / Scarcely had I entered my room when the telephone rang.
我刚一走进房门,电话就响了。
3. 比较until和till
此两个连词意义相同。肯定形式表示的意思是"做某事直至某时",动词必须是延续性的。否定形式表达的意思是"直至某时才做某事"。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。
肯定句:I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
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