七年级上册Unit9Myfavoritesubjectisscience一般现在时.docx

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1、一般现在时讲解一、定义与讲解一般现在时：表示经常性的事情，经常性的动作或一般性事实。时间状语：often经常，usually通常，always总是，every每个， sometimes 有时，at 在几点钟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。三单变化：1. （1）直接在动词词尾加-s askasks workworks2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es watchwatches wishwishes fixfixesdodoes gogoes（3）以“辅音字母加-y”结尾的动词，要先变y为i再加-es.trytriesstudystudi

2、es crycriesflyflies2.不规则变化：be is are havehas二、一般现在时用法1 .表示经常性，习惯性，永久性的动作或存在的状态,通常与副词sometimes, often, usually, always, every day （year, month ）, once （twice, three times） a day,等时间状语连用。They usually go to school by bike.I take the medicine three times a day.She helps her mother once a week.2 .表示客观真理，

3、科学原理，自然现象，等客观事实或格言，谚语等。The sun rises in the east and sets in the west every day.三、一般现在时的句子转换：（1）当句子中有be动词或情态动词时，则把be动词或情态动词（can, could等 等）提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.例：陈述句：She is a student.疑问句f Is she a student?否定句一 She is not a student.陈述句：I can swim.疑问句f Can you swim 否定句f I can not swim.（2）

4、 当句子中即没有be动词，也没有情态动词时，则在主语前加助动 词do （you,以及复数），does （单数she, he, it）变成问句；在主语后谓语动词 前加助动词don t （I, you,以及复数），doesn, t （单数she, he, it）变成否定 句，助动词后的动词要变成动词原形。例：陈述句：We get up at 7:00 every morning.疑问句f Do you get up at 7:00 every morning?否定句f 呢 don t get up at 7:00 every morning.陈述句：She has a 1 ittle brothe

5、r.疑问句f Does she have a little brother?否定句f She doesn, t have a little brother一般现在时练习 一、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 Saturday

6、s?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 homewo

7、rk well.14.1 (be) ill. Pm 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. Su Hai and Su Yang(have) eight lessons this term.20. What day(be) it today? Its Saturday.21. We often(play) in the playground.22. He(get)

8、up at six oclock.23. you(brush) your teeth every morning?24. What(do) he usually(do) after school?25. Danny(study) English, Chinese, math, science and art at school.26. Mike sometimes(go) to the park with his sister.27. At eight at night, she(watch) TV with her parents.28. Mike(read) English every d

9、ay?29. How many lessons your classmate(have) on Monday?30. What time his mother(do) the housework?二、句型转换1. Daniel watches TV every evening改为否定句)Daniel TV every evening.2.1 do my homework every day.(改为一般疑问句，并作否定回答) you your homework every day ?3.She likes milk.（改为一般疑问句，并作肯定回答） she milk? , .4 .We go t

10、o school every morning.（改为否定句）We to school every morning.5 .He speaks English very well.（改为否定句）He English very well.6.1 like taking photos in the Dark.（对划线部分提问） like taking photos?7. John comes from Canada.（加拿大）（对划线部分提问） John from ?8.Simon and Daniel like going skating改为否定句） Simon and Daniel going s

11、kating.9. Do you often play football after school?（肯定回答） .1 have many books.（改为否定句）I many books.11. Gao Shans sister likes playing table tennis.（改为否定句） Gao Shans sister playing table tennis.12. She lives in a small town near New York.（改为一般疑问句） She in a small town near New York?1.1 1 watch TV every d

12、ay.（改为一般疑问句） watch TV every day?14. David has a goal.（改为一般疑问句） David a goal?15. We have four lessons.（改为否定句） We four lessons.16. Nancy doesnt run fast.（改为肯定句）Nancy fast.17. Mike has two letters for him.（一般疑问句）Mike two letters for him?（否定句） Mike two letters for him.18. Mingming usually waters the flowers every day.（否定句）Mingming usually the flowers every day.（一般疑问句）Mingming usually the flowers every day?