1. in; on; at用在时间词前，表“在”
1) at+具体时刻
2) on+具体某天（具体某天的上、下午等；星期词；以及上、下午词前有修饰词时）
3) in+年、月、季节及一天中的某部分
但注意： at night= in the night at noon
at this/ that time at Christmas
eg. 1.___ the morning 2.___ Monday morning
3. ___ a rainy evening 4. ___ 3: 50 5.__ 2002
6.___ the morning of April 10 7.___ spring
8.___ night 9.___ this time 10. ___ March
另外注意：在时间词（ morning, afternoon, evening; Sunday…）前有 last, next, this, that时，不再用介词. tomorrow, tonight前也不用介词。
eg. I will go (A) to the cinema (B) in (C) this evening.
2. in, on, at表地点：
at一般指小地方； in一般指大地方或某个范围之内； on往往表示“在某个物体的表面”。例如：
eg. 1) He arrived___ Shanghai yesterday.
2) They arrived___ a small village before dark.
3) There is a big hole____ the wall.
4) The teacher put up a picture____ the wall.
3. in, on, to表方位
in(范围内，图 1)； on(范围外且接壤，图 2)； to(范围外但不接壤，图 3)。可表示为下图的位置关系
eg. 1) Taiwan is in the southeast of China.
2) Hubei is on the north of Hunan.
3) Japan is to the east of China.
4.
eg. 1) Can you swim_____ the river?
2) The road runs__________ the forest.
3)_____ the bridge, you’ ll find a cinema.
5. 
但 after+时间点：可与将来时连用。
1) I’ ll leave_______ three o’ clock.. That is, I’ ll leave________ about ten minutes.
2) They left_______ two weeks.
6. 
7. 
1) There is a map___ the wall
2) There are four windows___ the wall.
8. by bike/ bus/ car/ ship(单数且无冠词)
但当这些交通工具名词前有其它修饰词时，则应使用相应的介词。
eg. by bike= on a( the; his) bike
by car= in a( the; her) car
9. 
1) The moon rose______ the hill.
2) There is a bridge_____ the river.
3) There is a book______ the desk.
10. 
1) A big crowd of people were waiting for Li Lida on the beach. ________ them were his parents.
2) Tom sits________ Lucy and Lily.
11. on与 about:关于
eg. He gave a talk____ the history of the Party
12. 
1) There is a big tree_______ of the classroom.
2) A driver drives_________ of the bus.
类似区别： at the back of与 behind
13. with和 in:表示“用”
1) Please write the letter____ a pen.
2) Please speak____ a loud voice.
14. on a farm; in a factory; the girl in the hat; leave for:动身前往某地
15.一些固定搭配：
（ 1）介词与动词的搭配
listen to, laugh at, get to, look for;
wait for, hear from, turn on, turn off, worry about, think of, look after, spend… on…,等。
（ 2）介词与名词的搭配
on time, in time, by bus, on foot,
with pleasure, on one’s way to, in trouble,
at breakfast, at the end of, in the end等。
（ 3）介词与形容词的搭配
be late for, be afraid of, be good at,
be interested in, be angry with,
be full of, be sorry for等。
二、常见方位介词短语
（一）、由介词 in构成的方位介词短语
1、 in the front在前面
2、 in the front row在前排
3、 in the back row在后排
4、 in the third row在第三排
5、 in front of... 在前面（范围之外）
6、 in the front of... 在前部（范围之内）
7、 in the middle在中间
8、 in the street在街上
9、 in the middle of...在中间
10、 in the tree在树上（指飞鸟等外来物）
（二）、由介词 at构成的方位介词短语
1、 at the front of...在所在范围的前一部分
2、 at the back of...在所在范围的后一部分
3、 at the foot of...在脚下
4、 at the top of...在顶部
5、 at the end of...在尽头
6、 at the head of...在前头
7、 at the（ school） gate在（校）门口
8、 at the station在车站
9、 at No. 2 Chang’ an Road在长安路 2号
10、 at my uncle’s在我叔叔家
11、 at home在家
12、 at the doctor’s在医务室/在诊所
（三）、由介词 on构成的方位介词短语
1、 on the right/ left在右（左）边
2、 on one’s right/ left在某人的右（左）边
3、 on the desk/ table在课桌/桌上
4、 on the right-hand/ left-hand side在右/左手边
5、 on the blackboard在黑板上
6、 on/ in the wall在墙上/里
7、 on the paper在纸上
8、 on the tree在树上（指树上长的，结的东西）
三、其它介词构成的方位介词短语
1、 next to靠近/贴近
2、 beside the desk在课桌旁
3、 behind the door在门后
4、 under the bed在床下
5、 near the window靠近窗户
6、 outside the gate在门外
