时间前的介词

时间名词前的介词

1.in

①in常可以表示一天内的某一部分，如：in the morning/ afternoon/ evening/ night

但若具体指某一天的上午下午或晚上则介词改为on

He left on a cold Monday morning.

He was born on the night of September 9.

②in加时间段表示在某段时间之后，常可表将来。如in a few minutes/ hours/

days/months/ years

It will be ready i n a week’s time.

I will be back in a few days.

③在讨论月份，季节，年份，世纪是常用in

In （the）spring; in March; in 1980; in the twentieth century;

in the 1980s(在20世纪80年代)(注：若说在某人几十岁时用one’s, 如：he is in his thirties.他三十多岁了。)

2.on

①表示在具体的某一天，或在具体的某天的上午下午晚上

On Monday/ on May 10th/ on a cold morning

②表示节日的具体的一天

Mr li received a card on Teachers’ Day.

He invited me to a dance after the show on Christmas Eve.(2009陕西)

注：on Christmas Eve在圣诞节前夕（指具体的一天）

On Christmas Day在圣诞节那一天（指12月25日）

at Christmas在圣诞节（指整个节假日而不只是一天）

③on后加名词或Ving表示“一。。。。就。。。”

On his arrival/ On arriving in Beijing, Tom called up his friend.

3. at

①常用在时间点前，午夜黄昏黎明

at two o’clock; at dawn; at dusk; at night; at midnight

at the end of the week（在周末）

②at the weekend(但也可说on the weekend)

at Christmas在圣诞节（指整个节假日而不只是一天）

4.for

①加时间段说明前面动作延续的时间(动词需是延续性的)，常和现在完成时或完成

进行时连用，但亦要根据语境灵活运用。

His grandfather has been dead for three years.

They have been married for two years.

A long time ago, I lived in Beijing for two years.

②for加时间段常考时态，并且要注意since by等的相似与不同之处

区分下面句子：

I have been living here for two years.

I have been living here since two years ago.

I have been living here since I was born.

总结：Since其后加时间点或具有时间点的句子而for加的是时间段

★She has lived such a life in/ for/ during/ over the past/ last two years.

★She lived a hard life in the past.

总结：in/ for/ during/ over the past/ last加时间段，句子常和现在完成时相连若只有in the past，则句子常和过去时相连

5. by

到。。。为止，不迟于，

①后接表示过去的时间状语时常和过去完成时相连；接now等现在的时间状语时和现在完成时相连；接将来的时间状语时和将来完成时相连

They had finished their work by the end of last week.

She has finished her work by now.

--Tom is planning to buy a car.

--I know. By next month, he will have saved enough for a used one.(2011江苏)

②表示“在。。。情况下，在。。。时间”

Do you prefer to travel by day or by night? 你喜欢在白天还是夜晚旅游？

(by day 和in the day都可以表示在白天)

④加the 再加时间名词表示按。。计算

I’m paid by the hour/ day/ year.