一般现在时的讲解及用法一、定义与讲解1，定义：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。
2，只有在第三人称单数用动词的“三单变化”，其他用动词的原形。
注：1)第一人称（I，we) 第二人称（you）第三人称（He,She,they,it,所有的名字名称）单数（一个人或事物）复数（两个或两个以上的人或事物）第三人称单数（第三方的单个的人或事物，除了they）2)三单变化多数在动词（不是名词）后＋s eg: play — plays like — likes（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.（辅音字母：除a,e,i,o,u 这5个元音字母外的21个字母都是辅音字母；元音字母加-y：stay--stays play--plays say--says buy--buys辅音字母加-y:try---tries study---studies cry---cries fly---flies二、一般现在时的用法1，经常性或习惯性的动作，常与表示频度的时间状语连用。
时间状语：every day, sometimes,at…, on Sunday，usually,once a weekI leave home for school at 7 every morning.2，客观真理，客观存在，科学事实。
The earth goes around the sun.3，表示格言或警句中。
Practice makes perfect. 熟能生巧。
注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
例：Columbus proved that the earth is round..4，现在时刻的状态、能力、性格、个性。
Miss wang writes good English but does not speak well.5，在某些以here,there开头的句子中，用一般现在时表示正在发生的动作。
eg. Here comes a bus .公交车来了注：与一般现在时连用的时间状语（表示时间的词或词组）（1）表示频率的副词：always,often,usually,sometimes.（2）时间状语：on Sundays,every day ,every morning ,every year.（3）表示频率的词组：once a year,three times a week.动词有三种：实义动词，be动词，情态动词（初一未涉及）5，一般现在时中，当主语是第三人称单数，动词是实义动词（1）动词变相应的第三人称单数形式（2）肯定句主语+动词s+其它eg.(2011) Bill often gives money to the poor.（3）否定句主语+doesn't+动词原形+其它eg. Bill often doesn’t give money to the poor.（4）一般疑问句Does+主语+动词原形+其它eg. Does bill often give money to the poor.肯定回答Yes，主语+does(Yes,he does)（6）否定回答No，主语+doesn't(No,he doesn’t)6，当主语不是第三人称单数时（动词没有三单变化），动词是实义动词（1）肯定句主语+动词原形+其它eg.I want to marry you.（2）否定句主语+don't+动词原形+其它eg.I don’t want to marry you.（3）一般疑问句Do+主语+动词原形+其它eg.Do you want to marry me?肯定回答Yes,主语+do(Yes,I do.)否定回答No，主语+don’t(No,I don’t.)be动词的一般现在时有三种形式，即：am, is, are。
1. 如果主语是第一人称I时，be动词用am。
Eg.肯定句：I am a student. 我是一名学生。
否定句：am not一般疑问句：Am i肯定/否定回答：Yes,i am. No i am not.2. 如果主语是you （你，你们）, they （他们，它们，她们）或名词复数（两个以上的人或物）时，be动词必须用are。
如：肯定句，否定句，一般疑问句及肯定、否定回答You are my good friend.Tom and Lily are my good friends.They are my good friends.4，John always ______ others.A. helpB. helpingC. helpsD. to help5. He ______for eight hours every day.A. workingB. to workC. worksD. worked6. You’d better ______ at home and ______ your homework.A. to stay, doB. stay, doC. to stay, to doD. stay, to do7. He sits down and ______ a rest.A. havingB. haveC. to haveD. has8. Uncle Wang never ______ a cake.A. makeB. to makeC. makingD. makes（一）句子改错1. Is your brother speak English?2. Does he likes going fishing?3. He likes play games after class.4. Mr. Wu teachs us English.5. She don’t do her homework every evening.五、课后练习（一）用动词的适当形式填空1. She _________(go) to school at seven o’clock.2. It’s 6 o’clock. They are _________ (eat)supper.3. He usually ___________ up at 17:00.(get )4. She ___________ (live) in Beijing.5. Amy _________ (be) here just now.6. _______ (be)there a fly on the table just now?7. My father __________ (watch) TV every evening .8. My father _______________ (make) toys these days. 9．________ Amy _________ (read) English every day10. Chen Jie sometimes _________(go)to the park with hersister.（二）选择填空1．I want____homework now.A. doingB. to doC. to do myD. do my2．It's time______.A. go to schoolB. play gamesC. to go homeD. to domy homeworks3．____ you____ the blackboard? Yes, I am.A. Can, cleanB. Am, cleaningC. Are, cleaningD.Doclean4．______go and help her.A. Let's meB. Let's usC. Let'sD. Let's to5．What are they doing? They are______things away.A. putB. putingC. puttingD. carry6．Do they have a new car? Yes,_____.A .they are B.they have C. they don't D. they do 7．He often _________ supper at 6:00 in the evening.A. haveB. has c. is having D. is eating8. It’s 6 o’clock in the morning. He ___________.A. get upB. gets upC. is geting upD. is getting up9. What are you doing? I’m __________ TV.A. watchB. watchesC. to watchD. watching10. We _____________ any Chinese classes on Friday.A. are havingB. aren’t havingC. don’t haveD. are have11. Tom _______ an English class now.A. is havingB. hasC. havingD. have12. Are you playing basketball? No, we ___________.A. isn’tB. aren’tC. notD. don’t13. Listen! The girl _____________ in the room.A. singsB. singingC. is singingD. are singing14. The boy is __________ to his teacher.A. sayingB. speakingC. talkingD. telling（三）用括号内动词的适当形式填空。
1. He often _________ (have) dinner at home.2. Daniel and Tommy _________ (be) in Class One.3. We _________ (not watch) TV on Monday.4. Nick_________ (not go) to the zoo on Sunday.5. they _________ (like) the World Cup?6. What they often_________ (do) on Saturdays?7. your parents _________ (read) newspapers every day?8. The girl _________ (teach) us English on Sundays.9. She and I _________ (take) a walk together every evening.10. There _________ (be) some water in the bottle.11. Mike_________ (like) cooking.12. They _________ (have) the same hobby.13. My aunt _________ (look) after her baby carefully.14. You always _________ (do) your homework well.15. I _________ (be) ill. I’m staying in bed.16. She _________ (go) to school from Monday to Friday.17. Liu Tao _________ (do) not like PE.18. The child often _________ (watch) TV in the evening.19. Wang Kai and Wang li_________ (have) eight lessons thisterm.20. －What day _________ (be) it today? －It’s Saturday.。