主要介词区别讲解与实战演练
1．表示时间的at，in，on：
at表示片刻的时间，如：at 8 a.m. 常用词组有：at dawn, at noon，at night，at midnight，at the end of，at that time， at Christmas，at New Year等。
in表示一段的时间，如：in the morning/afternoon/evening，in October，in 1998，in the 21st century, in summer, in the past, in the future等。
on指特定的日子，时间：on Monday，on Christmas Eve, on May Day，on a warm morning, on September 12, on that day等。
2．表示时间的since和from：
since “自从…以来”，常与现在完成时、现在完成进行时连用。
from “自…起”，一般多与现在时、过去时、将来时连用。如：I hope to do morning exercises from today./We have not seen each other since 1995．
3．表示时间的in和after：
in+时间段，一般用于将来时。如：We' II be back in three days.
after+时间段，一般用于过去时。如： After two months he returned.
注意：after+时间点,可用于过去时和将来时。如：After seven the rain began to fall. / What shall we do after graduation?
4．表示方位的in，on，to：in表示 “在…内”， Beijing is in the north of China.
on指 “与…接壤，在河/江畔”， Korea lies on the east of China
to指在境外某方向，只强调方向Japan lies to the east of China．
5．表示“在……上”的on和in：
on只表示在某物的表面上，如：There is a book on the piece of paper.
in表示占去某物一部分，如： There is an interesting article in the newspaper. / He dug a hole in the wall.
6．表示“穿过……”的through, over和across：
through 指在内部穿过，
across则指在表面上的横穿，
over指在上方过去，跨越。如：The Great Wall winds its way from west to east, across deserts, over mountains, through valleys, till at last it reaches the sea.
7．In the end，at the end of，by the end of
in the end意为“最后”、“终于”； 如： In the end they reached a place of safety
at the end of表示“在…末梢”，“到…尽头”，既可指时间，也可以指地上或物体；如：
At the end of the road stands a beautiful garden.
They decided to have an English evening at the end of this week.
by the end of作“到…末为止”解，只能指时间，如：By the end of last month he had finished the novel.
8．between，among：
between一般表示两者之间。如：You are to sit between your father and me
among用于三者或三者以上的中间。如：. The girl quickly disappeared among the crowd.
注意：有时虽然是三个以上的人或东西，如果强调两两相互间接关系，仍用between。如：Agreements were made between the different countries. 在谈事物间的差别时，总是用between。如：They don’t know the difference between wheat, oats and barley．
9．besides，except，but，except for：
besides指“除了……还有”。如：Two foreign teachers were present at the meeting besides Smith．；
except指“除…外”，不能放在句首。如：We go to school every day except Sunday．
but与except意思相近, 常用在no, all, nobody, anywhere, everything ,no等词和其他疑问词后面。如：Who but a fool would do such a thing? except for表示“如无……就，只是”表明理由细节。如：His diary is good except for a few spelling mistakes.
10．表示用工具和手段的by, in, with：
by表用工具(by train / land / hand / email…)或手段(by reading…)，其后的名词前不带冠词；
with表用工具(with a pencil / our eyes)，其后的名词多被冠词、物主代词修饰；
in表示用材料、方式、方法、度量、单位、语言、声音等(in pencil/English/a low voice…)
11．as，like：
as指身份、资格，意为“作为”。 如：Let me speak to you as a father.(事实是父亲)
like作“象……一样”解。如：Let me speak to you like a father．(事实上不是父亲)。
12．as, with都有“随着…”之意。
as为连词，后接从句。如：As the day went on, the weather got worse
with为介词，后接名词或代词。. 如：With spring coming on, the weather gets warmer.
阅读下面短文，掌握其大意，然后选用适当的介词填空
It was so nice an afternoon that I decided to go for a little walk 1 my new boots---the ones I’d seen advertised on TV 2 “the world’s best boots”. Well, 3 theory, yes, they were very comfortable boots but I soon found that in fact they gave me blisters. In general I do enjoy walking, but at that moment all I wanted was rest and refreshment, in other words, I needed to sit down, have a drink and go home 4 the bus. The last bus home was in half an hour and I was far 5 the bus stop so I would have to get there 6 a hurry. At last I got to the bus stop just in time 7 a drink at the pub before the bus came. I limped to the bus stop in the hope 8 getting on. But I was out of luck because the bus was full up---not even standing room! I knew I’d never make it home on foot and I was 9 the point of returning to the pub to drown my sorrows when another bus came round the corner, completely empty. I got on, sat by myself at the back and started to feel 10 peace with the world again as I took off my boots!
答案
1. in 2. as 3. in 4. on 5. from 6. in 7. for 8. of 9. on 10. at
