八年级下知识精讲精练（综合）5

1、（英语提高培训）八年级下知识点精讲精练（五）语法精析A. If条件句1.江条件句:条件句用于陈述语气，表示假设的情况可能发生，其中if是“如果”的意思。 构成条件从句主句时态If一般现在时主语shall/will+动词原形例句If he comes,he will take us to the zoo.条件句构成If +一般现在时， 主语+shall/will+动词原形 If it doesnt rain tomorrow , I_ (go) to the zoo.2.用法: (1)条件状语从句通常由连词if引导，意为“如果，假如”，主句不能用be going to表示将来，而应该用shall

2、,will.If you leave now, you are never going to regret it.(错 误) If you leave now, you will never regret it.(正确) (2) if“如果”，引导条件状语从句，if从句则用一般现在时，主句用一般将来时。如: If it_( rain)tomorrow, I shant（wont） climb the hills. If I go to college, I will never become a great player. 【考例】 If_, I will go. A. he doesnt c

3、ome B. he wont come C. he will comeD. he is coming（注意宾语从句中的if与条件状语从句中的if的区别。 宾语从句中的if“是否”相当于whether，引导宾语从句，时 态需根据语境确定。 I dont know if it will rain tomorrow我不知道明天是否 会下雨。 ）1)(中考) Tommy, do you know if Frank _to the theatre with us this Sunday if it _? Sorry, I have no idea.A. will go, is fine B, goes,

4、 is fine C. will go, is going to be fine D. goes , will be fine 2) Ask him if he _to the school party. If he _,1 will be very happy.A. goes, goes B. will go, goes C. goes, will go D. will go, will goIf you go to Beidaihe, you _ (have) a good time playing in the water.We _(not have )the sports meetin

5、g if the weather isnt (not be)fine next week.I _ (am) very sorry if you cant join in our party.If you _ (not follow) the teacher in class, you wont be able to finish your homework very well.If he borrows your money but never returns, _ you _ (get) annoyed?If you _(drive) too fast, you may have an ac

6、cident.Dont go and play basketball if you _ (finish) your homework. We _ (not go) sightseeing if it rains (rain) tomorrow1.Some of us dont finish the homework. Our teacher is angry.（合并成含条件状语从句的复合句） Our teacher _ _ _angry _some of us dont finish the homework.2. Work lard, or youll fall behind others.

7、（改为if引导的条件状语从句）_ you _ work hard, youll fall behind others.If you dont get up early, you wont have enough time to have breakfast. (同义句) _ up early _ you will have enough time to have breakfast.语法专练1. The football match will be put off(推迟) if it _. A. will rain B. rains C. rainedD. is rained 2. There

8、 _ a basketball game this afternoon. A. is going to have B. will beC. is going to play D. will play 3. This work is _ for me than for you. Adifficult Bthe most difficult Cmost difficultDmore difficult 4. Ill catch up with Lucy before she _ the finishing line. Areach Bis reaching Creaches in Dwill re

9、ach *5. If you don t go fishing tomorrow,_. A. he will, too. B. he wont, either C. he does, too. D. he doesnt, either. 6. I wont go if it _ tomorrow. Arain Bis raining Crains Dwill rain 7. Im waiting for my fiend. _, Ill go shopping alone. A. If she comes B. If she will come C. If she doesnt come D.

10、 If she wont come 8. After the meeting, we will have a party, if you _ free, come and join us.A. will be B. have C. will have D. are 9. I dont know if it _ tomorrow. If it _, I will go camping.A. will rain; doesnt rain B. rains; wont rain C. will rain; will rain D. rained; rained 知识点精讲1. have a grea

11、t/good/nice/wonderful time玩得愉快= _ _=enjoy oneself =play happily 2. be famous _因出名 be famous _ 作为出名 Einstein was famous _a great scientist. A. for B. as C. like D. because Chongqing is famous _its hot pots and mountain city. A. for B. as C. like D. becauseHangzhou is famous _ its beautiful scenery.3.

12、 laugh _嘲笑 1) If someone makes mistakes, dont _ them. A. laugh to B. laugh at2) Dont run or shout _the party. If you do, youll_leave. A. in, have to B. at, must C. in, must D. at, have to4. get injured受伤 【考例】 Professional athletes are easy to get _.A. injured B. injure C. injuring D. injures5.let in

13、意为“让进来” Eg. Windows _ _light and air. You must keep the door closed: Dont _the dog_. If we are late for class, the teacher wont _. A. let us in B. let in us C. let us intoD. let out us6.Class此处指全班同学。Half a/an; half, half the后接名词，表“一半”。Eg. He ran half a mile/ a half mile in half an hour I have finish

14、ed half the book. 注意表“半个”或“个半”时，half 一词的 用法。 Eg. _ an hour半小时，_ a year半年，one year and a _一年半=one and a half years一年半，five days and a half=five and a half days 五天半 【考例】I have read _ the book. A. half of B. half C. a half D. halves(3) half the +n.=half of the + n.谓语动红词根据名词来 确定。 Half of the students _(

15、be)boys.=Half the students are boys.Half the work _(be)finished now.=Half of the work is finished now.现在完成了一半的工作。 (4) class作为集体名词，为主语时，谓语动词用单.数。 作“学生”时，谓语动词用复数。类似词还有school, team, family等。 Our class _(be)hard-working.我们班的学生勤奋。 Our class _(be)a big one.我们班是个大班 .(5)half n. 半 （pl.） halves 把苹果切成两半。Cut th

16、e apple into two _.7. seem like+名词好像，似乎 eg. It _ _years since we last met.我们似乎好几年不见了。 8. all the time一直 Eg. Look! The monkeys _( run and jump) all the time.看!猴子们一直在跑在跳。I was doing the same job _.I really feel bored. A. all time B. all the time C. the whole time D. the all time9.特殊疑问词+to +动词原形 这个不定式短

17、语可以用宾语从句来替换如下: I cant remember how I can get to your house.= I cant remember _ _get to your house.Eg. Can you tell me what I shall do. = Can you tell me _ _ _.We know who we will ask. = We know _ _ ask.10. (1) enough 足够的，修饰可数名词或不可数名词，可以放在名词前面，也可以放在名词后面。 He has _ _ to take exercise.他有足够的时间锻炼身体。 Adv.足

18、够地，修饰形容词、副词，并依枉其后。 The house is_ .这间房子够大。A. big enough B. enough big He didnt run _. 池跑得不够快。 A. enough fast B. fast enough(2)too to, so that和enough to do sth.的句式在一定的情况下可以互换。 在肯定句中 so that. 的复合句可以转换成含有enough to do sth.结构的句子Eg. He worked so hard that he finished the work in time. =He worked hard_ _ fi

19、nish the work in time. 在具有否定意义的句子中，三者可以相互转换，但 应注意too to在和enough to do sth.与so that转换 时，应用句中形容词的反义词或将that从句改为否定句。 Eg. He is too young to join the army. =He is _ young_ he cant join the army 或:He isnt _ _ to join the army. = 3 * GB3 如果so. . . that结构中主句和从句的主语不是一致的，应在enough to do sth.和too. . . to结构中的不定式

20、前 加上“for sb. ( sth.)”的短语。Eg. English is so useful that all of us should learn it well. =English is_ _ for us to learn well. The maths problem is so difficult that I cant work it out. =The maths problem is _difficult for me _ wok out.= The maths problem isnt _ _ for me _work out. 11.take away 拿走，使离开

21、take it/them away (代词放中间)【考例】1)Please take that cat_. I hate animals.A. away B. off C. in D. go 2)These are your books. Please _. A. take it away B. take them away C. take away it D. take away them 3) Dont forget_ when you go out. A. to take it awayB. to take away it C. taking away itD. took away it

22、（2013南开中考综合）III. 完形填空。（每小题2分，共20分）根据短文内容，从A、B、C、D四个选项中选出一个能填入相应空格内的最佳答案，并把答题卡上对应题目的答案标号涂黑。We are now living in the 21st century . Is your classroom living in the 21st century , too ? Tony is a student in Grade 8 at an American middle school . He was surprised when he saw his modern 41 on his first d

23、ay of school .In Tonys classroom , there are many new electronics（电子设备）like iPads . This semester , they will 42 the electronics to take notes , watch videos and do projects and homework . “ Its 43 ” , said Tony . “ I prefer using an iPad to work on math or other projects 44 my team members . ”The s

24、chool uses new technology（技术）in classrooms to help students see , hear , touch and experience their tasks . “ Technology is pretty common in most of our classrooms now , ” the head teacher said . “ We are trying to use technology to 45 the world to kids . It can bring the outside world in . ”Science

25、 teacher Mr. Miller agrees . “ It is a 46 way for students to know the outside world , ” he said .Mr. Miller now regards himself as a guide of learning 47 as a teacher . “ If they have a question for me , I will try to teach them 48 to find the answers rather than tell them what the answers are , ” he said .Dale , another student , loves technology . He was not really interested in class before , 49 now he likes the classes very much . “ It helps me use what I know about tec