亠般现在时的讲解及用法、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；元音字母力卩-y : stay--stays play--plays say--says buy--buys辅音字母力卩-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 Sun day，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 En glish 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,ofte n, usually,sometimes.（2）时间状语： on Sun days,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+does n't+动词原形+其它eg. Bill ofte n does n 'give money to the poor.（4）一般疑问句Does+主语+动词原形+其它eg. Does bill ofte n 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 '）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.l want to marry you.（2）否定句主语+don't+动词原形+其它eg.I don '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,l don '.）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amEg.肯定句：I am a stude nt. 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 frie nd.Tom and Lily are my good frien ds.They are my good frie nds.are 与主语还可缩写。
如：We are= We're ， They are =They're, You are = You're。
而 are 与 not 可缩写成 aren't 。
如：They aren't students. 他们不是学生。
但是 am与not不能缩写。
3. 如果主语是单数名词、不可数名词或单数第三人称代词（ he, she, it ）时，be动词用is。
肯定句/否定句/ 一般疑问句及肯定、否定的回答如:My mother is a teacher. 我的妈妈是一名老师。
He is a stude nt. 他是一名学生。
is 也可与主语缩写，如：He is = He's, My mother is = My mother's 等。
但是This is 不可缩写。
而is与not可缩写成isn't 。
如:This isn't a book. 这不是一本书。
三、课堂练习巩固1, 主语为第三人称单数肯定句： He ___ g ets ____ （get） up at six o' clock. 否定句：doesn' t ,get 一般疑问句：Does he get up at six o ' clock.（肯定，否定回答）2, 主语为第一人称I__get__（get）up at six o' clock. 否定句：I don' t get up at sixo' clock.一般疑问句：Do you get up at six o ' clock.（肯定，否定回答）四、课堂强化练习（一）单项选择题1，The picture _______ n ice.A. looksB. is lookedC. lookD. is look ing2，She _______ down and soon falls asleep.A. liveB. la inC. laidD. sits3，The teacher _________ us to come to school on time.A. askB. ask ingC. asksD. asked4. John always ______ others.A. helpB. helpi ngC. 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 dow n and ___ a rest.A. hav ingB. haveC. to haveD. has8. Un cle Wang n ever ____ a cake.A. makeB. to makeC. maki ngD. makes(二)句子改错1. Is your brother speak En glish?2. Does he likes going fish ing?3. He likes play games after class.4. Mr. Wu teachs us En glish.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 Beiji ng.5. Amy__________ (be) here just now.6. ______ (be)there a fly on the table just now?7. My father __________ (watch) TV every eve ning .8. My father _______________ (make) toys these days.9. ________ Amy ___________ (read) English every day10. Che n 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. todo my homeworks3. ____ you ____ the blackboard?Yes,I am.A. Can, clea nB. Am, clea ningC. Are, clea ningD. Doclea n4. ____ go and help her.A. Let's meB. Let's us5. What are they doing? They are ____ t hings away.A. putB. put ingC. putt ingD. carry6. Do they have a new car? Yes, ___ .7. He often _________ supper at 6:00 in the evening.A. haveB. has c. is hav ing D. is eat ing8. It ' s 6 o ' clock in the morning. He ________ .A. get upB. gets upC. is geti ng upD. is gett ing up9. What are you doing? I ' m ____________ TV.A. watchB. watchesC. to watchD. watchi ng10. We _______________ any Chin ese classes on Friday.A. are havingB. aren ' t havingC. don ' t haveD. are have11. Tom _________an En glish class now.A. is hav ingB. hasC. hav ingD. have12. Are you playi ng basketball? No, we ________A. isn ' tB. aren ' tC. notD. don ' t13. Liste n! The girl __________ in the room.A. singsB. singingC. is singingD. are singing14. The boy is __________ to his teacher.A. say ingB. speak ingC. talki ngD. telli ng(三) 用括号内动词的适当形式填空。