一﹑time常用句型 1. It‘s time for sth. 是做……的时候了。
2. It‘s time (for sb.) to do sth. 是(某人)该干……的时候了。
3. It‘s (high) time + that从句(that可以省略,从句谓语动词用虚拟语气)是某人(早)该干某事的时候了。
4. It (This / That) is the first (second, third ……) time + that从句(从句要用现在完成时)。这(那)是某人第一(二、三……)次干某事。如主句谓语动词是过去时,则that从句要用过去完成时。
5. by the time引导的时间状语从句。若从句用一般现在时,主句要用将来完成时;若从句是一般过去时,主句要用过去完成时。
6. each time(每次),next time(下次), any time(任何时候)等词组引导的时间状语从句。
7. the first / second / third …… time 可以引导时间状语从句。
二﹑time构成的词组 at the time; at that time; at one time; at a time
at the time通常用于过去时句子中,指某件事情发生的“当时”、“那时”。例如:
Many people saw the strange thing happen at the time. 当时,许多人都看到了这件奇怪的事情的发生。
有时,at the time的后面可接“of...”短语。这时,它表示“在(某事态)发生的时候”或“在……的时代”。例如:
Were you in San Francisco at the time of the big earth quake in 1989﹖
1989年旧金山发生地震时,你在那里吗?
It happened at the time of King Alfred. 事情发生在阿尔弗雷德国王时期。
at that time 则通常指前文明确提到的某个时期、时候。通常其后不带“of...”短语。例如:
In the 17th century much corn was grown in Tibet and Sichuan.At that time
(=At the 17th century) the land along the Changjiang River was becoming very crowded.
at one time=during a period of time in the past意为“过去有一段时期”,“曾经”。例如:
They used to be good friends at one time. 他们曾经是好朋友。
at a time则意为“一次”,表示一个时间单位。它常与表示数量的词语连用,表示频率。例如:
Don’t speak all at once.One at a time, please. 不要同时一起说。一次只一个人说。
Take the medicine three times a day and three pieces at a time. 这些药每天服三次,每次服三粒。
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