at the time,at that time,的区别

at the time,at that time,的区别
日期:02-10 16:57:17| 英语词法与短语|45教学网| http://www.45sw.com

at the time,at that time,的区别是关于高中学习 - 高中英语 - 英语词法与短语方面的资料,

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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Tags:英语词法与短语   ,高中英语词汇表,高中英语词组,高中英语单词

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