一般现在时语法+三单精讲

1、一般现在时精讲一、什么是一般现在时：一般现在时：表示经常性的事情，经常性的动作或一般性事实。结构：主语+动词（单数或者复数根据主语决定）二、什么时候用一般现在时：1. 当句子表示客观真理，客观存在，科学事实时：The earth moves around the sun.Shanghai lies in the east of China.2. 当句子是名言警句时：Pride goes before a fall.骄者必败。3. 当句子表示现在时刻的状态、能力、性格、个性：I dont want so much.Ann Wang writes good English but does not

2、 speak well.4. 当句子中出现了时间标志语： （1）表示频度的副词或词组always ,often, usually, sometimes，once a year等 （2）every day, in the morning, every year，at 在几点钟 等时间状语三、一般现在时怎么用：当句子符合上面任何一种情况，则句子采用一般现在时，这时候动词要开始改变啦，兵分2路改变：大部队一路：当主语是第三人称单数时：1、动词变成相应的第三人称单数形式（动词的复数形式）2、肯定句：主语+动词复数+其它3、否定句：主语+doesnt+动词原形+其它（其中的does代表动词的复数，不代表

3、没有任何意义）4、一般疑问句：Does+主语+动词原形+其它？5、肯定回答：Yes，主语+does6、否定回答：No，主语+doesnt7、特殊疑问句：特殊疑问词+一般疑问句？（一般疑问句中用does)小分队一路：当主语不是第三人称单数时：1、动词不变成相应的第三人称单数形式（动词不用变成复数）2、肯定句：主语+动词原形+其它3、否定句：主语+dont+动词原形+其它（其中的do代表动词的单数，不代表没有任何意义）4、一般疑问句：Do+主语+动词原形+其它？5、肯定回答：Yes，主语+do6、否定回答：No，主语+dont7、特殊疑问句：特殊疑问词+一般疑问句？（一般疑问句中用do)总结起来就

4、是这样的一般现在时的结构肯定式疑问式否定式否定疑问式I work.Do you work?I dont work.Dont you work?You work.Do you work?You dont work.Dont you work?We work.Do you work?We dont work.Dont you work?They work.Do they work?They dont work.Dont they work?He(She,It) works.Does he(she,it) work?He(She,It) doesnt work.Doesnt he(she it) w

5、ork?四、那么，动词如何变成复数呢：三单变化：（1）直接在动词词尾加-s.ask-asks work-works get-gets stay-stays（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es.watch-watches wish-wishes fix-fixes do-doesgo-goes pass-passes（3）以“辅音字母加 - y”结尾的动词，要先变y为i再加-es.try-tries study-studies cry-cries fly-flies情况构成方法读音例词一般情况加 -s清辅音后读/s/ 浊辅音和元音后读/z/swim-swims；

6、help-helps；like-likes以辅音字母+o结尾的词加 -es读/z/goes,does以s,sh,ch,x等结尾的词加 -es读/iz/watches,washes以辅音字母+y结尾的词变y 为i再加es读/z/study-studies不规则变化have和be动词变have 为 has变be为am,is,arehave-has be-am,is,are一般现在时专项练习一、考点/易错点1 动词变形有误1 He _ football very well.2 Danny _ to school at 7:10.答案：1 plays 2 goes plaies, gos 解析：1以辅

7、音字母加y结尾的动词变单三人称形式才能把y换成i再加es；2与名词变复数不同，变单三人称形式以o结尾的词要加es. 考点/易错点2 对主语判断有误例： This book _mine答案: is 解析: 书是属于 “它（it）”的范围，是无生命的它，所以也是三单。二、例题精析We often_(play) in the playground.A. play B. plays C. plaies D.playedA主语是”we”,“often”是频率副词，句子用一般现在时三、实践运用【基础】1. The picture _ nice. A. looks B. is looked C. look

8、D. is looking答案：A解析：主语是第三人称单数，谓语动词用三单形式2. I _TV once a week.A. watches B. watchs C. watch D.watched答案：C解析：once a week一周一次，表示频率，动词用一般现在时。主语是第一人称，动词用原形。【巩固】1. John always _ others. A. help B. helping C. helps D. to help答案：C解析：主语是第三人称单数，谓语动词用三单形式2. The teacher told us that the sun _in the east. A.rises

9、 B. rose C. raises D.raised答案：A解析：太阳从东方升起，这是客观事实，用一般现在时，动词要用单三式【拔高】1. The students will go to the Summer Palace if it _ tomorrow. A. dont rain B. doesnt rain C. wont rain答案：B。2. You should visit this part of the country when _. A. spring will com B. spring comes C. It has been spring D. It will be s

10、pring 答案：B 解析：when 引导的时间状语从句，从句一般时态，主句用一般将来时态或祈使句。所以选B专项练习：写出下列动词的相应形式： 1. 第三人称单数： wash_ match _guess_ study_ finish_ go_ snow_ carry_ 2.写出下列动词的过去式：stop_ see_ drive _let_ carry_ keep_ join_ find_ think_ teach_ catch_ 3. 写出下列动词的现在分词形式： stay_ begin_ forget_ forget_ lie_ die _ run_ prefer_ give_ ring_

11、dance_ hope_ II. 用所给动词的适当形式填空： 1I _(write) to you as soon as I _(get) to London. 2. He doesnt feel well and _(not eat) any food this morning. 3. He _ not _(see) me come in, for he _(read) something with great interest. 4. I _(let) you have the book as soon as I _(finish) it. 5. While we _(wait) for

12、our teacher, a little boy _(run) up to us. 6. Dont make a noise. Grandpa _(sleep). 7.Its seven now, Toms family_(watch) TV. 8. It _(take) me two hours to finish my homework last night. 9. What _ your mother _(do) at eight yesterday evening? She _(wash) clothes. 10. _ it _ (rain) when school was over

13、 yesterday? 11. What _(do) _ tomorrow? We _ (play) football. 12. There _ (be) a football match on TV this evening. 13. They said they _ (visit) the Great Wall the next summer holiday. 14. Who _ (dance) the best in your class? 15. Will you come if he _ (not come)? 16. The teacher told us the earth _

14、(move) round the sun. 17. They _ (have) a party in the garden if it _ (not rain) tomorrow. 18 She _ (buy) a sweater yesterday. 19. I dont know if Mr.Wang _ (go) to Shanghai tomorrow. If he _ (go), I _ (ask) him _ (take) some books to my daughter, because she _ (study) there. III单项选择： 1.The students

15、will go to the Summer Palace if it _ tomorrow. A.dont rain B. doesnt rain C. wont rain 2. There _ an English film next week. A. will have B. is going to have C. is going to be D. was going to be 3. The picture _ nice. A. looks B. is looked C. look D. is looking 4. She _ down and soon fell asleep. A.

16、 live B. lain C. laid D. lay 5. They _ the office at nine yesterday morning. A. reached to B. arrived C. went D. get to 6. We shall go to Shanghai on business before you _ back next week. A. wil come B. came C. would come D. come 7. Dont smoke until the plane _ off. A. takes B. took C. was taken D.

17、is take 8. I saw her _ the room this morning. A. to enter() B. entered C. enter D. enters 9.the teacher asked us _ to school on time. A. to come B. coming C. come D. comes 10. John is always _ others. A. help B. helping C. helps D. to help 11. He told us _ at eight. A. working B. to work C. work D. worked 12. Youd better _ at home and _ your homework. A. to stay, do B. stay, do C. to stay, to do D. stay