一般现在时一.含义：一般现在时表示经常、反复发生的动作或存在的状态2. 用法：1）表示经常、反复发生的动作，现存的习惯或状态。I am a teacher. We are Chinese.2）表示客观事实或普遍真理。例如：There are seven days in a week. The earth goes round the sun.3）表示安排或计划好的未来的动作，只限于go, come, leave, start, stay, return, arrive, begin, be 等动词。例如：My train leaves at 6:30 this morning.-How long do you stay here?4）表示主语的特征、性格、能力等。 Tom studies very hard. She is always ready to help others.二、.时间状语一般现在时常和 always, often, usually, every day/month/year,once a week,on Sundays sometimes等表示时间的状语连用二. 构成及变化1.be动词的变化。肯定句：主语+be(am,is,are)+其它。如：I am a boy.我是一个男孩。否定句：主语+ be + not +其它。如：He is not a worker.他不是工人。一般疑问句：Be +主语+其它。如：-Are you a student? 肯定回答：-Yes. I am. /否定回答： No, Im not.特殊疑问句：疑问词+一般疑问句。如：Where is my bike?2. 行为动词的变化。1）、行为动词在一般现在时中的用法：一般人称的谓语动词用原形.，但单数第三人称做主语时谓语动词词尾发生变化：即.动词词尾加-s；或.-es， 动词遇到单数第三人称时的表示方法在一般现在时中, 当主语是单数第三人称时, 行为动词的形式是在词尾加 -s 或 es具体方法如下：(1)多数动词直接加s:runsgetslikescolletstakesplaysclimbs.(2)结尾是s, x, sh, ch, o,前为辅音字母,结尾加es :watchesteachesgoesdoeswashescrossesmixesbrushes(3)动词末尾y前为辅音:将y改为i加es: studystudies flyfliescarrycarriescrycries但在y前如果为元音则直接加s:buyssays注意: 动词加 -s 以后的读音.1.在p t k f 等清辅音后， 发清辅音 /s/ eg. helps , works, likes,hates ,laughs2.在浊辅音和元音后， 发浊辅音 /z/ eg. drives, cleans, plays3.在s z 后， 发 /iz/ eg.rises, wishes, teaches, urges4.在t d后，发 /ts/ /dz/ eg. fits, sets, needs5. 其他情况下发z eg. plans, cries, shows32、.否定形式：主语是第三人称单数，在行为动词前加doesnt. 行为动词变为原形。 其余人称作主语时，都在行为动词前加dont He likes reading books. 变否定句 He doesnt like reading books.I like playing football. 变否定句 I dont like playing football.3、.一般疑问句：主语是第三人称单数的，将助动词does提前，行为动词变为原形。其余人称作主语，将助动词do提前，句号变问号。主语I ,we 变you ; some 变any .1).He likes reading books. 变一般疑问句：Does he like reading books? 肯定回答：Yes, he does. 否定回答：No, he doesnt.2).I like playing football. 变一般疑问句： Do you like playing football? 肯定回答：Yes, I do.否定回答：No, I dont.3).We like nice flowers. 变一般疑问句：Do you like nice flowers? 肯定回答：Yes, we do.否定回答：No, we dont.一般现在时的四个基本句型总结谓语动词是be谓语动词是do主语是：第三人称单数主语是：非第三人称单数am/ is/ aredoesdo肯定句He is a teacher.He goes to school every day.They go to school every day.否定句He is not a teacher.He doesnt go to school every day.They dont go to school every day.一般疑问句Is he a teacher?Does he go to school every day?Do they go to school every day?Yes, he is. No, he isnt.Yes, he does. No, he doesnt.Yes, they do. No, they dont.特殊疑问句What is he?What does he do every day?What do they do every day?一般现在时：表示经常性的事情。1、时间状语：often经常, usually通常, always总是， every每个, sometimes有时， at在几点钟 注意：只有第三人称单数用动词三单 ，其余动词均用原形三单变化： 1)、多数在动词后加s：playplays likelikes 2)、以s，x，sh，ch，o结尾的动词加es：gogoes wash-washes3)、以辅音字母加y结尾，把y改i再加es：flyflies练一练1.We often_(play) in the playground.2. He _(get) up at six oclock.3._you _(brush) your teeth every morning.4. What (do) he usually (do) after school?5. Danny (study) English, Chinese, math, Science and Art at school.6. Mike sometimes _(go) to the park with his sister.7. At eight at night, she _(watch) TV with his parents.8._ Mike_(read) English every day?9. How many lessons _your classmate_(have) on Monday?10. What time _his mother_(do) the housework?改句子1.Do you often play football after school? (肯定回答)2.I have many books. （改为否定句）3.Gao Shans sister likes playing table tennis （改为否定句） 4.She lives in a small town near New York. （改为一般疑问句）5.I watch TV every day. （改为一般疑问句）6.David has a goal. （改为一般疑问句）7.We have four lessons.（否定句）8.Nancy doesnt run fast （肯定句）9.My dog runs fast. （否定句，一般疑问句）10.Mike has two letters for him. 一般疑问句，否定句：11.I usually play football on Friday afternoon. 否定句，一般疑问句:12.Su Yang usually washes some clothes on Saturday.否定句:一般疑问句:划线提问:13. Su Yang usually washes some clothes on Saturday.(划线提问)14. Mingming usually waters the flowers every day否定句:一般疑问句:划线提问15.Tom does his homework at home.否定句:一般疑问句:划线提问：Mr. BlackMr. Black teaches (教授) us English this term(学期). He is a tall man. He likes wearing a white shirt and black trousers. He speaks English very well. We like his lessons(功课)very much.His home is near the school. Sometimes Mr. Black walks to his home. He has two little sons. They look the same. They often wear the same clothes(衣服). He loves to see them and play with them. Mr. Black calls(称呼) the two boys Da Mao and Xiao Mao.Tick or cross( ) 21. Mr. Black is our English teacher.( ) 22. Mr. Black is very short.( ) 23. We dont like his lessons.( ) 24. Maybe Da Mao and Xiao Mao are twin