20. 1. in用法：在某年、某季节、某月、某世纪的年代等固定短语
前用介词 in。
in 1995，in spring，in October，
in the 1990’s (在20世纪90年代 )，
in the morning，in the afternoon，
in the evening...
2.on用法：在某日，星期几，（某年）某月某日，特定的早上、
下午、晚 上，或有修饰语的时间前用 on
on the third，on Monday，on July 1,1921.
on the morning of June 1，on Saturday afternoon，
on the early summer，on the late afternoon...
21. 3.at用法 : 在几点钟和一些固定短语中，用介词 “at”。
at eight，at noon，at night...
4.for用法: 表示 一段时间。
I have been in Beijing for four years．
我在北京呆了四年。
Is it all right if I use it for a minute?
我能使用一下它吗？
5.after用法：表示“在……之后”。
After seven, the rain began to fall．
雨是7点钟以后开始下的。
22. 6.from…to…用法: 表示从某一点时间到另一点时间的一段
时间
My mother studied in Beijing University
from 1960 to 1964.
注意：不用介词表示时间的词或词组
含this, that, last, next 的表示时间的名
词词组,以及某些时间的副词或名词词组前不用介
词,如：this year/ last summer / yesterday/
the day after tomorrow 等。
23. 表地点位置的介词
1. over与above (under与below)
on, over，above都表示“在……的上面”，
on 表示“在某事物表面上”
over表示“正上方”，
above只表示“在上方”但不一定在“正上方”。
over under，
above below ．
There is a bridge over the river
Our plane flew above the clouds．
On
On
On
Over
Under
Above
Below
24. 2.at, in
at通常指小地方，in一般指大地方。
We’ll meet at the supermarket .
I had to stay in the supermarket as it was raining
hard.
3.after, behind
after 指顺序先后
behind 指位置在某事物之后，相对于in front of 而言
He entered the classroom after the teacher
He hid himself behind the door 他在门后。
25. 表示“用” 的介词
with 多指用工具，用身体的部位或器官；
by 表示使用的方法、手段；
in 指使用某种语言。
We see with our eyes.
We go there by bike.
Please say it out in English.
He cut it open with a knife.
26. 介词常见搭配
(1)．动词+介词
listen to, laugh at, write to,
hear from, get to, look at,
shout at/to, knock at, look for,
look at, ask for, wait for,
get on, get to, put on,
turn on, take off, take away,
learn from, worry about walk along
27. (2)．形容词+介词
afraid of, full of, angry with,
strict with, busy with, good at,
good/bad for, late for, sorry for,
ready for, famous for, polite to,
far from...
(3)．名词+介词 / 介词+名词
key to, visit to, in surprise,
after class, for ever, on time,
at last, at first, for example.
28. Exercises:
1）The little girl is looking________ her mother.
2）Thank you ________ your help.
3）Don't read ________ bed.
4）Tom comes ________ the USA.
5）English names are different Chinese
names．
6）We always have a class meeting Monday
afternoon．
7）The story took place a cold night.
