专题：介词课件

1、 考点揭密考点揭密1.了解介词的定义：表示词语间语义关系的词叫介词，了解介词的定义：表示词语间语义关系的词叫介词，介词用于名词或名词词组或相当于名词词组的结构介词用于名词或名词词组或相当于名词词组的结构前。前。2.熟悉介词的结构：简单介词、复合介词和短语介词；熟悉介词的结构：简单介词、复合介词和短语介词；介词不能单独使用作句子成份，必须和名词或代词介词不能单独使用作句子成份，必须和名词或代词组成介词短语；如果用在动词前，动词必须用动名组成介词短语；如果用在动词前，动词必须用动名词形式。如：词形式。如：thank sb.for doing sth. what about doing sth.wi

2、thout doing sth等；介词短语等；介词短语在句中一般可作定语表语，宾语补足语，状语等。在句中一般可作定语表语，宾语补足语，状语等。 3.介词的用法很灵活，同一个介词有时会有好多不同介词的用法很灵活，同一个介词有时会有好多不同的用法，如：的用法，如：for, at，with，on等。熟记一些常用等。熟记一些常用的介词短语并灵活运用。的介词短语并灵活运用。 常用介词的用法辨析常用介词的用法辨析 （1）表时间的介词 1）at, in on 表示时间点用at。例如：at six oclock, at noon, at midnight。 表示在某个世纪，某年，某月，某个季节以及早晨，上午，

3、下午，晚上时，用in。例如：in the ninettenth century, in 2002, in may, in winter, in the morning, in the afternoon等。 表示具体的某一天和某一天的上午，下午，晚上时，用on。例如：on Monday, on July 1st, on Sunday morning等。 2)since, after由since和after 引导的词组都可表示从过去某一点开始的时段，但since词组表示的时段一直延续到说话的时刻，因而往往要与现在完成时连用。而after词组所表示的时段纯系过去，因而要与一般过去时连用。例如： I

4、 havent heard from him since last summer. After five days the boy came back. 3)in, afterin与将来时态连用时，表示“过多长时间以后”的意思，后面跟表示一段时间的词语。After与将来时态连用时，后面只能跟表示时间点的词语。After与过去时态连用时，后面才能跟表示一段时间的词语。例如： He will be back in two months. He will arrive after four oclock. He returned after a month. （2）表示地点的介词）表示地点的介词 1

5、）at, in, onat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： He arrived in Shanghai yesterday. They arrived at a small village before dark. There is a big hole in the wall. The teacher put up a picture on the wall. 2)over, above, onover, on和above都可表示“在上面”，但具体含义不同。Over表示位置高于某物，在某物的正上方，其反义词是under。 above也表

6、示位置高于某物，但不一定在正上方，其反义词是below。On指两个物体表面接触，一个在另一的上面。例如： There is a bridge over the river. We flew above the clouds. They put some flowers on the teachers desk. (3)across, throughacross和through均可表示“从这一边到另一边”，但用法不同。Across的含义与on有关，表示动作在某一物体的表面进行。Through的含义与in有关，表示动作是在三维空间进行。例如： The dog ran across the gras

7、s. The boy swam across the river. They walked through the forest. I pushed through the crowds.4) in front of, in the front ofin front of 表示“在某人或某物的前面”，在某个范围以外；in the front of 表示“在的前部”，在某个范围以内。例如： There are some tall trees in front of the building. The teacher is sitting in the front of the classroom

8、. 3. 介词的固定搭配 介词往往同其他词类形成了固定搭配关系。记住这种固定搭配关系，才能正确使用介词。 （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, spendon, 等。 （2）介词与名词的搭配 on time, in time, by bus, on foot, with pleasure, on ones way to, in trouble, at breakfast, at th

9、e 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。用适当的介词填空用适当的介词填空1.We usually have lunch_ noon.2.Lin Tao was born_ February 18th.3.Ann sits_ my right,_ Kates left.She sits_us.4.My father is leaving_ Suzhou tomorrow.

10、5.We must learn_ each other. 课时训练课时训练 at on on on between for from 6.They went_ the gate and entered the garden.7.We can do all things _our hands.8. _the end of the last cap，he caught up _the others.9.Be kind_ people. Dont shout _people.10.Last month he worked_ a teacher _three weeks. 课时训练课时训练 throu

11、gh with Atwith to at as for.单项选择单项选择1.His father is very angry_ him his study. A. at，with B. with，at C. to，about D. about，to2.Paper is made _wood. A. from B. of C. by D. in3.The basket is full _apples. A. with B. of C. in D. by4.Kate cant come. Lets ask wei Hua instead _her. A. of B. for C. to D. wi

12、th5.The heavy rain stopped me_ getting to school on time. A. to B. from C. on D. for 课时训练课时训练BABAB6.Li Lidas parents are very proud _their son. A. to B. in C. for D. of7.The fox looked up_ a cock sitting the tree. A. to，in B. at, in C. for，on D. at，on8.Please wait _the bus stop near my home. A. for

13、B. at C. next D. in front9.Where is your bike made_? A. in B. from C. of D. /10.When the red light is on， its dangerous to go the street. A. across B. through C. cross D. to 课时训练课时训练(D)(B)(B)(D)(A)Do you use prep. in your composition correctly?Many animals are in danger, such like tigers and pandas.

14、 When farmers cut down trees, tigers can no longer hide and hunt. Many tigers are killed by people. They want to sell their fur towards money. And there are few places that pandas can live. We are not alone on the world. We humans could not live without all the plants and animals around us. So protecting wildlife animals are very important. We m