中考复习知识点之时间状语从句

中考复习知识点之时间状语从句

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时间状语从句

(1) 时间状语从句常用when, as, while, before, after, since, till, until,as soon as等连词来引导。

例如:

It was raining hard (rain hard下大雨)when I got to school yesterday.

While he was doing his homework, the telephone rang.

As she walked along(沿着走)the lake, he sang happily.

He had learned a little Chinese before he came to China.

After he finished middle school, he went to work in a factory.

(2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。例如:

I’ll ring you up as soon as I get to NewYork.

I will tell him everything when he comes back.

He won’t believe it until he sees it with his own eyes.

(3) 在带有till或until引导的时间状语从句的主从复合句里, 如果主句用肯定式, 其含义是“一直到……时,谓语动词只能用延续性动词。如果主句用否定式,其含义是“直到……才…….”“在……以前不……”,谓语动词可用瞬间动词。例如:

The young man read till the light went out (熄灭) .

Let’s wait until the rain stops.

We won’t start until Bob comes.

Don ‘t get off(从下来) until the bus stops.

【till是指直到某一特定事件发生的时候,而在那个时刻之后,该事情或状况仍将持续。Until是指直到某一特定事件发生的时候,而讲话的人在自己心里认为,在那个时刻之后,该事情或该状况将中止(不怎么可能持续)。固定组合里 from moming till night中, till/until是不能替换的.】

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