哪些主语是第三人称单数? 现归纳总结如下：
一、人称代词he, she, it是第三人称单数。
如：
He likes watching TV. 他喜欢看电视。
he has lunch at twelve. 她十二点吃午餐。
It looks like a cat. 它看起来像只猫。
二、单个人名、地名或称呼作主语；是第三人称单数。
如：
①Han Mei looks like her mother. 韩梅看起来像她的母亲。
②Beijing is in China. 北京在中国。
③Uncle Wang often makes cakes. 王叔叔经常做蛋糕。
Bob does his homework every day. 鲍勃每天都做家庭作业
三、单数名词或"this / that / the+单数可数名词"作主语时，是第三人称单数。
如：
②This book is yours. 这本书是你的。
③That car is red. 那辆小汽车是红色的。
④The cat is Lucy's. 这只猫是露茜的。
四指示代词this,that作主语时，是第三人称单数。
如：
③This is a pen. 这是一支钢笔。
④That is an eraser. 那是一块橡皮擦。
动词第三人称单数的变化规则
1、直接在动词后+s
like- like s play-plays
2、以s, x, sh, ch, 接尾的动词+es
wash-wash es
3、以辅音+o接尾的动词：+es go-go es
4、以辅音+y接尾的动词：变y为i+es
f ly-f lies stud y →stud ies 注意：（动词三单特殊形式）
go→goes，do→does
have→has be→is
巩固练习题：（三单形式）
1.work_______
2. watch_________
3. clean________
4. write_______
5. teach_______
6. wash__________
7. have_______
8.read________
9. go__________
10. do__________
11. fly________
12. study_______
13.She ---------- (watch) TV.
I ---------- (watch) TV.
I 写出动词的第三人称单数
work________
read_______
clean______ write______ teach_______ guess______ watch______ study________ cry________ play______ have______ match ______ finish______ carry______ say________
go________
do ________ play ________ jump ________ swim________ run________ put________ sing ________ dance________ come________ get ________ have ________ fly ________ study________ read________ write ________ look________ drink ________ eat ________ walk ________ like ________ 二．填空：
1.She ______(do) homework by herself.
2.Jack ______(go) home by bike.
3.The giant______(climb) up the beanstalk.
4.Her mum ______(run) to the goose.
5.He______(do not)like apple.
6,Sam______(put) it under his arm.
7.The boy_______(chase) it.
8.Kitty______(watch)TV everyday.
9.He______(feed)them at 8:00 in the morning.
11.Grandma Wang___(live) in Pudong.
12.The girls___(give) the key to Grandpa.
13.That key ______(open) the old box.
14.She ______(say) “I like these puppe ts”.
17.He doesn’t______(know)her name.
18.John can’t_______(find) his watch.
19.Where _____(do)Grandma live?
20.How does he______(go)to the post office?。