常用介词的主要用法1．abou t（1）关于Tell me something ab out your life.a story abou t Lei Feng 一个关于雷锋的故事---Which subject should I talk abou t？---C hoose any subject．Something abou t England，for example．（2）大约I usually get up at abou t six o'clock every morning．At the beginning of the twentieth century，the world's population was abou t 1，700 million．（3）到处，在周围He looked ab out himself.Is Jim anywhere abou t？吉姆在这儿吗？2．above（与below相反）(1)在......上头，高出Above the blackboard there is a clock．（2）以上，超过（数量，年龄等）In the Northeast it will be fine．The temperature will stay abovezero in the day time，but at night it will fall below zero again．3．Across（1）横过There is a new bridge across the river．China has built a new Great W all across the northern part of the country．（2）在......对面，在那一边The toilet is across the street．4．after 在......之后（与before相反）Read after me ，please．Is playing basketball after lunch g ood or bad for your health？5．Against（1）Don't stand against the door．不要靠墙站着。
（2）反对，对着We were playing against No．64 Middle School．He is against the suggestion．他反对这项建议。
6．along沿着、顺着？Can you tell me the way to the museum，please？？Yes ，g o along Zhongshan Road，and tu rn right at the second crossing．7．among在......当中例如：We visited him at his workplace among the you ng trees and asked him abou t his work．8．Around（1）在......周围There are many flowers around the house．（2）在......那一边，在转过......的地方The bookshop is just around the corner．拐角过去就是书店。
9．round 环绕（多表示在某物周围的动作；around则多表示在某物周围的静物），在各处。
例如：The earth goes round the sun．What d o you have to d o rou nd the house when you are at home？10．at（1）在（小地方或地理上的一点）I usually stay at home on Sundays．Turn rig ht at the traffic lights．（2）在（时间的一点，如几点几分）We have lunch at twelve．（3）在......旁边（往往有目的）例如：They are going to meet at the school gate．（4）向What are you looking at？The man went u pstairs and knocked at the d oor．（5）对（一般用于表示感情的动词之后）The overseas C hinese was surprised at the changes which had taken place in his village since 1949．这位华侨对1949年以来他家乡所发生的变化感到惊奇。
（6）表示比率、速度、价格等。
He ran at full speed．他尽快地跑。
The car ru ns at the rate of sixty miles an hour．这辆汽车每小时行六十英里。
We sell goods at fixed prices．我们按价售货。
（”in”指空间范围内，”at”指空间的某一点。
）例如：But they still pu t their stockings at the end of their beds 。
I saw him in town．A man lived in a tall building in the city of Beijing．一般说来，”at”用在小地名前，”in”用大地名前。
比如当我们指到达某地点时，小地方用arrive at，在地方用arrive in．例如：Do you know what time the plane arrives in Moscow？We arrived at the village at three．我们三点钟到达村子。
11．before（与after相反）（1）在......前面（位置）例如；He is standing before the door．他正站在门口（门前）。
We were all here before you;you must wait for your turn．（2）在......之前（时间）You can't buy them in the shop before eight o’clock．12．behind在......的后面（与after不同，只能表示位置，不能表示时间。
）Lucy's bag is behind her chair．There are some trees behind the house．13．below在......下面，低于Please sign your name below the line．请在这条线下面签字。
The temperatu re is three degrees below zero．温度是零下三度。
（under表示处于直线的下面，below仅表示位置低于所提及的事物。
）14．beside在......旁边Come and sit beside me．过来坐在我的旁边。
There is a fruit shop beside the road．路旁有一个水果店。
15．between在......二者之间例如：Do you know the difference between the two verbs”bring”and “take”？你知道”bring”和”take”这两个动词的区别吗？There is a clothing shop between the bookshop and the shoeshop．Are you able to come between 8：00 and 9：00tomorrow？16．bu t(=except)例如：All but one came to the meeting．只有一个人没到会。
17．except除......外。
例如：Everyone is at school except Lin Tao．We have classes every day except Saturday and Sunday．(besides表示”除......之外，还......”；except表示”反......不算在内”或”把......除去”)例如：All except Jim went．除吉姆外都去了。
（吉姆没有去）Besides Jim，many other students went．除吉姆外，还有许多同学也去了。
（吉姆去了）18．B y（1）被（常用于被动结构，后接动作的执行者）English is spoken as a first language by most people in the U．S．A．English is used by travellers and business people all over the world．（2）在......的近旁There is a chair b y the table．（3）在......之前，不迟于A UN report says that the world population will pass six billion by the end of the twentieth century．（4）以......为手段He succeeded b y working hard．他由于工作努力而获得成功。
She usually comes to school b y bus．（by后跟名词表示交通工具的还有：by plane或by air，by shiip或by sea，by train，by trolley-bus坐无轨电车，b y taxi 坐出租汽车，by undergrou nd坐地铁等。
）（5）从旁经过When I go to the office，I pass by Beihai Park．我上班的时候，要经过北海公园。
19．d own沿......而下（反意词是up）We walked down the hill before sunset．我们在日落前下山。
20．during在......时期；当中I think that maybe his C hinese teacher will give Jim some work to do during the holiday．21．For（1）为It's time for dinner．Best wishes for teachers day．（2）对This lesson is too difficult for me．这本书对我来说是太难了。