in,after,later--ago与before的区别

  • 格式:doc
  • 大小:28.50 KB
  • 文档页数:2

in,after,later的用法区别
in,after,later 都含有“在„„以后”的意思,
但它们在用法上有区别。
 in与after 均可与一段时间连用,表示“在„之后”,但是:
after 表示以过去时间为起点的一段时间以后,因此通常与一般
过去时连用;after还可与时间点连用,此时则可用于一般将来
时(但是in不能与时间点连用);而 in 则表示从现在算起的一
段时间以后,因此通常用于一般将来时或含有将来意义的句子。
如:
He came back after three days. 3天后他回来了。
He will arrive after five o’clock. 他 5 点钟以后到。
I’ll come back in three days. 我3天后回来。
 later作副词,可以指过去,也可指将来,常常放在时间段的
名词之后,也可单独用。如:
Three days later he got to Beijing.
=After three days he got to Beijing.他三天以后到了北京。
At first she was asleep. Half an hour later/After half an
hour she woke up. 开始她睡着了,半小时后醒来了。
The radio says that the sun will come out later.收音机里
说太阳稍后会出来。
用in, after或later填空。
1.I shall go swimming ______ four o'clock this afternoon.
2. They will return _________ two weeks.
3. We shall come again _________.
4. The meeting ended _________ an hour.
5. He is going to London _________ three days.
6. We started out ______ two weeks.
A. in B. after C. later D. for
7.Just____seven the rain began to fall.
8.He went there a few days______.
9.She will come to see us ________ .
10.I shall come round _________a day or two.
11.He then left home,and came back______ a year.
参考答案:
1. after 2. in 3. later 4. after 5. in
6.B 7.after 8.later 9.later 10.in 11.after

before 和 ago 的区别
ago和before这两个词都可以作“以前”解,但是用法是有区别
的:
1、 ago放在表示时间段的词语后,意思是“从现在算起的若干
时间以前”,谓语动词常使用一般过去时。例如:
He can ride a bike now but he couldn't a few weeks ago.
他现在会骑自行车了,可是他几个星期以前不会。
2、before可以用作介词,常放在表示时间点的词语前。
例如:Please come to my office before nine o'clock.
请在九点以前到我办公室。
They will come back before six o’clock.
他们将在6点前回来。
3、before还可以用作连词。例如:
Where did your sister study before she joined the army?
你妹妹在参军以前,在哪学习?