一般现在时讲解和练习.doc

一，概念： 一般现在时态表示 经常、反复发生的动作或存在的状态及现在的某种状态。、表示目前或现在存在的状态或特征. E.g. She is often late.、表示客观存在及普遍真理。 E.g. The earth is round.、表示现在经常和习惯性发生的动作，常与 sometimes, often, usually, always, everyday never 等时间状语连用。一般现在时态句子动词分为两种1.be动词 (is ,am, are )2.行为动词（run, speak, call, say.）二，句子结构：(一) （1）含有Be动词的一般现在时态肯定句：主语 + be (am/is/are)+表语 I am a student. It/ She/He is a teacher. You/They are classmates.（2）否定式：主语 + be(am/is/are)+not+表语 .（3）一般疑问式： Be (am/is/are)+主语 + 表语？ 例如:She is a student.变否定：She is not a student .变一般疑问句：Is she a student ？肯定否定回答：Yes ,she is . No ,she isnt.练习:1.That is an English teacher.(变为复数句)2.These are some drivers（改为单数句）3.There is a map on the wall.(改为否定句)4.There are some computers on the desk.(改为一般疑问句)5.Daming is in the classroom.(改为否定句)6.We are students.(改为一般疑问句，并作肯定回答)（二).含有行为动词的一般现在时(1.)肯定句：主语+行为动词（speak，say，run.）+其他。注意：在一般现在时态的肯定句中，当主语是第三人称单数（she, he, it），行为动词要变第三人称单数例如：1) I speak English.2) She/He/It speaks English. 3) They call me Tom.4) He runs very fast.练习：写出下列动词第三人称单数的变化形式Be-have- come- go- stay - teach - write- take- study - watch - fly- play-(2).含有行为动词的.一般现在时态的否定和疑问句一般疑问句：Do(Does)+主语+动词原形+表语。否定句：主语+dont(doesnt)+动词原形+表语。注意：在一般现在时态中，当谓语动词是行为动词的时候，变否定和一般疑问句时，要借助助动词do和does帮忙。当主语是第三人称单数(she, he, it)的时候用does，其他人称用do. 借助助动词do和does以后，动词要用动词原形。例如： I run very fast.变否定句：I dont run very fast .变一般疑问：Do you run very fast ?肯定/否定回答：Yes, I do./ No, I donte.g.： She likes Maths.变否定句：She doesnt like Maths.变一般疑问：Does she like Maths?肯定/否定回答：Yes, she does. /No, she doesnt.练习:一 、就单词的正确形式填空1.He _ (look) tired. 2.Lilei as well as his friends_(be)at school now3.The panda _(live) in China.4.They usually_ (come) to school early5.Class_ (begin) at eight every morning.6.Tom always _(have)lunch at school.7.How _(be) your father ?8.There _(be) a school there.二、将下列句子变成否定式和一般疑问句 1Her name is Li Ling. 2We go to school at night.3My brother works in a factory. 4. She plays basketball.三、单项选择 1. The Browns_a nice car and Browns brother _ a nice jeep. A. have, have B. has, has C. have, has D. has, have2. Their house_not like ours.What_ it look like? A. is, is B. is, does C. does, does D. does, is3. Daming _pandas very much. A.like B.is like C. likes D.does likes4.I _like science. A.am not B dont C. not D doesnt.四、用所给词填空1The buses _ (use) a lot of oil.2My daughter_ (watch) TV every day. 3. Sometimes she _(see) a film on Sunday.4Li Wei_ (have) a daughter. She_（stay）in a nursery（托儿所）.5. She _(be) a teacher.6.I_(be) a student.7 .He usually runs in the morning.(变否定和一般疑问句)8. I speak Chinese.(变否定和一般疑问句)9. There is a bed in this room.(变否定和一般疑问句)当堂检测：一，用括号内动词的适当形式填空。n 1. He often _(have) dinner at home. n 2. Daniel and Tommy _(be) in Class One.n 3. We _(not watch) TV on Monday. n 4. Nick _(not go) to the zoo on Sunday.n 5. _ they _(like) the World Cup? n 6. What _they often _(do) on Saturdays?n 7. _ your parents _(read) newspapers every day?n 8. The girl _(teach) us English on Sundays.n 9. She and I _(take) a walk together every evening.n 10. There _(be) some water in the bottle. n 11. Mike _(like) cooking.n 12. My aunt _(look) after her baby carefully.n 13. You always _(do) your homework well. n 14. I _(be) ill. I m staying in bed.n 15. She _(go) to school from Monday to Friday. n 16. Liu Tao _(do) not like PE.n 17. The child often _(watch) TV in the evening.n 18. Su Hai and Su Yang _(have) eight lessons this term.二，按照要求改写句子n 1. I do my homework every day.(改为一般疑问句，并作否定回答)n _n 2. She likes milk.(改为一般疑问句，并作肯定回答)n _n 3. We go to school every morning.(改为否定句)n _n 4. He speaks English very well.(改为否定句)n _n 5. I like taking