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1、动词第三人称单数形式讲解1、什么是第三人称单数？人称可分为三类：第一人称、第二人称和第三人称第一人称：I we第二人称：you第三人称：he、she、it、they 和人名 称谓类（如：Peter、Jane、my father 等）结合以上知识，第三人称单数就是he、she、it、人名、称谓。2、动词为什么要变成相应的三单形式？在一般现在时中，跟在第三人称单数后面的动词也要变成相应的三单形式,例如：I watch TV every day.如果主语是三单，动词要变化：He watches TV every day.She watches TV every day.Jane watches TV
2、 every day.3、动词三单的变化规则1、一般情况下直接加 s ,如 speak-speaks, like-likes, play-plays2、以 s, xz sh, ch, o 结尾的加 es ,如 wash-washes, go-goes,do-does, watch-watches3、以辅音字母+y结尾的，改y为i再加es ,如study-studies , try-tries4、特殊变化，如have-has4、does和doesnt在句子中的用法否定句：主语+ dont/doesnt+动词原形+ (其他)。如：I dont watch TV.我不看电视。当主语为第三人称单数时，
3、要用doesnt构成否定句。如：He doesnt watch TV.他不看电视。注意doesnt后面用动词原形watch ,而不是watches一般疑问句：Do / Does+主语+动词原形+ (其他)。如：Do you watch TV?Yes, I do. / No, I dont.Does he watch TV?Yes,he does./No,! doesnt.练习题：1. He often (have) dinner at home.2. Daniel and Tommy(be) in Class One.3. We(not watch) TV on Monday.4. Nick(
4、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.(参考答案 l.has 2.are 3.dont 4.doesn
5、,t go 5.Do like 6.do,do7.Dozread 8.teaches 9.take 10.is )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.14.1 (be) ill. Tm 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 Yanq (have) eight lessons this term.20. - What day (be) it today? - Its Saturday.(参考答案 11 .likes 12.have 13dooks 14.do 15.am 16.goes ly.doesn 18.watches 19.have 20.is )