1、八下英語時間狀語從句專題復(fù)習(xí)一、知識講解時間狀語從句定義：時間狀語從句是指在復(fù)合句中充當(dāng)時間狀語的句子。When、while、as引導(dǎo)的時間狀語從句類別作用例句as（1）as表示“當(dāng)?shù)臅r候”，往往和when/while通用，但它著重強(qiáng)調(diào)主句與從句的動作或事情同時或幾乎同時發(fā)生。（2）一般與延續(xù)性動詞連用，有時也可以用短暫性動詞；作“隨著.”的時候，只能跟延續(xù)性動詞She came up as I was cooking.(同時)The runners started as the gun went off.(幾乎同時)when（1）(at or during the time that )既可

2、以表示在某一點(diǎn)的時候，又可表示在某一段時間內(nèi)，主句與從句的動作或事情可以同時發(fā)生也可以先后發(fā)生。（2）when引導(dǎo)的從句的謂語動詞，既可以是延續(xù)性的，又可以是短暫性的It was raining when we arrived.(指時間點(diǎn))When we were at school，we went to the library every day.(在一段時間內(nèi))whileWhile意思是“當(dāng)?shù)臅r候”或“在.期間”。主句中的動作或事情在從句中的動作或事情的進(jìn)展過程中發(fā)生，從句中的動詞一般要用延續(xù)性動詞。在when表示a period of time時，兩者可以互換。如果主句和從句中的動作是兩

3、個同時進(jìn)行的長時間的動作或事件,那么主句也要用進(jìn)行時。Please dont talk so loud while others are working.He fell asleep while/when reading.Strike while the iron is hot.(用as或when不可，這里的while意思是“趁”)While my sisiter was sweeping the floor， I was washing the dishes注：當(dāng)從句的動作發(fā)生在主句動作之前時，只能用“when“，不能用“as”.When you have finished homework

4、, you may have a rest當(dāng)從句表示“隨時間推移”的意思是，只能用“as”，不能用“when”或者“while”在when 和while引導(dǎo)的從句中，當(dāng)主句和從句的主語一致，并且從句中有be動詞時，可以省略主語和be動詞，鉤沉when/while+ing結(jié)構(gòu)。如：When ( she is) in trouble , she always asks for my help. 她遇到困難時總是向我求助。While （ I am）travelling， I like to buy some souvenirs. 旅游時我喜歡買紀(jì)念品。Before、after引導(dǎo)的時間狀語從句1、b

5、efore意為“在以前”,引導(dǎo)時間狀語從句時,一般表示主句的動作發(fā)生在從句動作之前。He kept his head down for weeks before the final exams.他考試前認(rèn)真努力學(xué)習(xí)了好幾周。2、after意為“在以后”,引導(dǎo)的從句一般表示主句的動作發(fā)生在從句動作之后。Ill call you after Ive spoken to them. 我和他們談了以后就給你打電話。注：如果before和after 后面省略主語，則動詞需+ingI often watch TV before going to bed.我經(jīng)常睡前看電視。Im finally starti

6、ng to feel like myself again, after battling that cold for weeks.幾周的感冒過后，我終于恢復(fù)正常了。since引導(dǎo)的時間狀語從句1、since意為“自以來”,引導(dǎo)時間狀語從句時,從句的謂語動詞表示動作的起點(diǎn),用一般過去時;主句的謂語動詞表示動作開始以后延續(xù)至今,一般用現(xiàn)在完成時。如果主句表示目前的情況,可以用一般現(xiàn)在時。Youve grown since the last time I saw you! 自從我上次見到你后，你又見長了！since引導(dǎo)的從句的謂語動詞既可以是延續(xù)性動詞，也可以是短暫性動詞since持續(xù)性動詞過去式(

7、從動作結(jié)束時算起)since瞬間動詞過去式(從該動作發(fā)生時算起)It is two years since he smoked.他戒煙已有兩年了。It is two years since he joined the army.他參軍兩年了。3、since的特殊句型(1)It is/has been+時間+since.，表示“自從以來到現(xiàn)在已有多久了”。It is/has been two years since I left Shanghai.自從我離開上海已經(jīng)有兩年了。(2)時間+has passed +since.，表示“自從，多長時間過去了”。注意，這里時間作主語，看成一個整體，謂語動

8、詞用單數(shù)。Eight months has passed since I started this diet.自從我這次節(jié)食，八個月過去了。till或until引導(dǎo)的時間狀語從句until/till意為“直到”,如果主句的謂語動詞是延續(xù)性動詞,主句和從句都用肯定式;此時 until和till可以互換，但until更正式如果主句的謂語是短暫性動詞,主句用肯定式,從句用否定式,即用not.until形式,表示“直到才”.The money will be held in trust until she is 18. 這筆錢將由人代管到她18歲為止As soon as或whenever引導(dǎo)的時間狀語

9、從句As soon as表示“一.就“，時態(tài)運(yùn)用比較靈活一般是兩種情況：1、指未發(fā)生的動作,規(guī)律是：主句一般將來時,從句用一般現(xiàn)在時代替一般將來時如：I will tell him the news as soon as he comes back.注：有時,為了特意表達(dá)剛剛完成某事就如何如何,需要用現(xiàn)在完成時.如：I will go with you as soon as I have washed my face.2、指緊接著發(fā)生的兩個短動作,主從句都用一般過去時如 He took out his English books as soon as he sat down不過,也有從句和主句

10、都用一般現(xiàn)在時的情況.如：As soon as he finishes his classwork,he runs out of the class.他一做完課堂作業(yè),就跑出了教室.whenever意思是“每當(dāng)，任何時候”，如：He likes listening to music whenever he has time.每當(dāng)他有時間的時候，他喜歡聽音樂。注意：此時 whenever可以用every time替換。二、總結(jié)練習(xí)一、用before, after, when, while, since, till /until, as soon as, whenever填空1.Ill go to

11、 visit my aunt in England _ the summer holidays start. 2.-You have been in Nanjing very long ? - Yeah,_my parents came here.3.I entered the room _ Li Ming was talking with her.4.Many people do not realize the importance of health_they have fallen ill.5.He came to China _ the war was over .6.Jenny, w

12、ill you leave for the USA now?No. It will be two weeks _ I leave here. 7._ John was watching TV, his wife was reading a book.8.He was about to go to bed _ the doorbell rang.9.I like music _ my brother like sports.10._ he gets the chance, he reads his favourite books.二、選擇題(1). When shall I hand in my

13、 report? As soon as it _ tomorrow.A. completes B. is completed C. will complete D. will be completed(2)Look! My mother _ a new dress for me. Wow, it looks very nice on you. A. is makingB. has madeC. will make(3)Sam, do you know if Alice _ to my party next week? I think she will come if she _.A. come

14、s; is invitedB. comes; will be invited C. will come; is invited D. will come; will be invited(4)-Lets go to the museum if it _ tomorrow. -But nobody knows if it _tomorrow. A. wont rain, rains B. doesnt rain, rains C. wont rain, will rain D. doesnt rain, will rain(5)Nancy _ us a report as soon as she

15、 _ tomorrow.How great! I will be there.Agives; is arriving Bgives; will arriveCwill give; arrives Dgives; arrives(6)They can go home as soon as the homework _.A .finished B. finishes C .was finished D .is finished (7) I called you last night, but nobody answered. Where were you then? Oh, I _ my pet

16、dog in my yard. A. walkedB. was walking C. am walkingD. will walk(8)Ive never seen Mr. Taylor before. Dont worry. I _ him to you before the meeting. A. will introduceB. introduced C. have introducedD. had introduced (9)Wars are disasters. A large number of people will lose their homes if a war _.A.

17、breaks down B. is broken down C. breaks out D. is broken out(10)-Hi, do you know if Tom_to my party next week?-I think he will come if he_free.A. will come, will be B. will come, is C. come, is D. comes, will be三、檢測Welcome to the Painting Competition for Woolands Students.The International Anti-Drug

18、 （禁毒）Day this year is coming soon. In order to raise teenagers awareness （意識）to fight against drug taking., The city Art Council is going to hold a painting competition for the students in our city.Students who want to take part in the competition can hand in their own 2D paintings in either of the

19、following two ways:Each school will be provided with a box for students to put in their paintings. Boxes will be picked up by the City Art Council on Thursday, July 23rd, 2016, before the end of the school day. Paintings can be also handed in on Friday, July 24th, from 8:00 am to 10:00 am at the Woo

20、dlands Art Hall (175 Riverside Street).All paintings are required to be 60cm wide by 80cm long or smaller. Larger sizes will not be accepted. Each student can only hand in one painting.The final decision on the competition results will be made on June 26th, the Anti-Drug Day. The name list of the wi

21、nners will be made known on the website of the City Art Council on the same day. All winning paintings will be shown to the public at the City Youth Park from June 27th till the end of July.Prize: 1st Prize（10 students）=$300 Gift Card each.2nd Prize（20 students）=$200 Gift Card each.3rd Prize（30 stud

22、ents）=$100 Gift Card each.For further information:Visit http: / or call 2569-8632. ()56.Students in woodland can take part in_held by the City Art Council.A. a pop music concertB. a singing competitionC. a painting competitionD. a name-signing activity.()57.The main purpose of this competition is_.A

23、. to teach the teenagers some painting skillsB. to tell the teenagers to walk away from drugsC. to provide the teenager with some art knowledgeD. To introduce the history of the Anti-Drug Day to the teenagers.()58.The size of the paintings like_will NOT be accepted.A. 40 cm wide by 60 cm long B. 50

24、cm wide by 70 cm long C. 60 cm wide by 80 cm long D. 80 cm wide by 100 cm long ()59.The public can enjoy the winning paintings_.A. at the City Youth Park B. at the City Art Council C. at 175 Riverside Street D. at the Woodlands Art Hall ()60.Which of the following is true according to the passage?A.

25、 Students must put their paintings in the school box on June 24th. B. Each student can take part in the competition with one 3D painting. C. Students can get more information about the competition in two ways. D. Each of the second prize winners in the competition will get 300 dollars. BWhen people

26、talk to each other, write letters or make phone calls, words of the spoken form or the written form, can send any messages they want to pass onBut besides words, do you know any other ways can use to communicate with people? Reach expressions on your face can be one of them.A smile on your face show

27、ed that youre happy. Tears in your eyes tell others that you are sad or excited. Body languages can do the same job. When you put your hand up in class, the teacher knows that you want to say something or you may have some questions to ask. You shake your head from side to side and people know you a

28、re saying no or refuse others requirements. When you nod, people will understand that youre saying yes or agree to others opinions or suggestions. Other forms can also carry different messages. For example, a sign at the bus stop gives passengers instruction on which bus to take. The flag language m

29、ade by soldier can pass a different orders. Sound from the school bell tells the students and teachers went to begin or end a class. A photographer can use the photos he has taken to tell others about what he thinks of the world around him. Music and films also can convey the feelings and ideas of t

30、he musicians the directors. So next time when you see a piece of art or listen to some music, take it as communication with its creator and try to get the meaning behind it.()61.When people want to use the words to communicate with others, they _.A. write lettersB. cry aloud C. keep silentD. make fr

31、iends()62.According to the passage you just need to_ if you agree to others suggestions.A. close your eyes B. put up your hand C. move your head up and down D. shake your head from side to side ()63.Through a photo， we may know_.A. which bus can be taken B. what the orders mean for soldiersC. how th

32、e photographer sees the world D. when the students should have a class()64.The underline word convey probably means_in the passage.A. 掩飾B. 傳遞C. 克制D. 爆發(fā)()65.The best title for the passage may be_.A. Spoken and Written LanguagesB. Forms of CommunicationC. Facial Expressions and GesturesD. Suggestions

33、on Communication CIt is reported that some developed countries have shipped broken parts of computers to China.Such a thing can be founded every day although it is against international laws. Last month Hong Kong officers found 131, 000 kilograms of broken computers, TVs and phones sent from Japan.T

34、hings like these are called electronic waste, or e-waste. Dealing with it is not an easy job because dangerous poison like mercury(汞) and lead(鉛) can be found in them. Every time an old computer breaks down, it needs to be dealt with safely. But at present, broken computer parts are usually buried.

35、It may be hundreds of years before they are really goes in the earth.Many places in China are polluted by e-waste. Guiyu in Guangdong province is one of them. This town is named as “the e-waste capital of the world”. It has to deal with 1.5 million kilograms of ewaste each year, from which it makes 75 million yuan. But it comes at a cost. Many of the poison in e-waste find their way into the environment. Plastic is burned outdoors and chemical water is poured into rivers, Greenpeace, an environmental group, has