动词第三人称单数形式（动词三单）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（我们）第二人称： you第三人称： he、she、it、they和人名类（如：Peter、Jane、my father等）结合以上知识，第三人称单数就是he、she、it和单个的某人，也包括单个的动物、东西等2、 动词在什么情况下要变成相应的三单形式？在一般现在时的肯定句中，跟在第三人称单数后面的动词要变成相应的三单形式一般现在时态：一般现在时态用于表达经常、反复发生的动作，存在的状态或习惯性的动作例如：I watch TV every day（每天）. 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 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, x, 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、 do,does和don’t,doesn’t 在句子中的用法否定句：主语+don’t/doesn’t+动词原形+（其他）。
如：I don’t watch TV. 我不看电视当主语为第三人称单数时，要用doesn’t 构成否定句如：He doesn’t watch TV. 他不看电视注意: doesn’t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 don’t.当主语为第三人称单数时，要用does 构成一般疑问句如：Does she watch TV? Yes, she does. / No, she doesn’t.注意：does引导的三单问句中，动词也要用原形特殊疑问句：疑问词+一般疑问句如：What do you do on Sundays? I watch TV.What does Lingling have in the afternoon? She has English.五、动词第三人称单数形式的练习A、写出下列动词的第三人称单数like ________ go _______ do________ ride________ have_______ pass_______ play swim_______ eat______ sleep ________ watch______ B、用括号内动词的适当形式填空。
1.He often ________(have) dinner at home.2.We _______ (not watch) TV on Mondays.3.Nick _______ (not go) to the zoo on Sundays.4.______ they ________(like) meat?5.Mike _______(like) swimming.6.They _______(have) the same hobby(爱好).7.My brother _______(like) reading（阅读）.8.Liu Tao _______(do) not like PE.9.His sister ________ (cook烹饪) nice food. I _______ (like) eating it very much.10._______ (do) your father_______ (watch) TV in the evening? No, he_______ (not). 11.Tom usually_______ (play) football after school.12.I ______ (go ) to school by bus, and he ______(go) to school by bike.C、选出正确的答案：1. She (like / likes) to play football. 2. He (like / likes) drinking milk.3. I (like / likes) to watch TV. 4. We (like / likes) to play badminton.5. They (like / likes) to sing songs.6. He (play / plays) table tennis every day(每天).7. Jane and Linda (play / plays) football every day.D、把下列句子变为否定句：1. She likes milk. 2. They go to school on Mondays. E、把下列句子变为疑问句，并做否定回答。
1. Tom likes swimming. __________________________________ _________________________2. Sam and Amy watch TV in the afternoon. 。