单三：⑴直接加s,例：run-runs,draw-draws,see-sees
⑵在s,x,sh,ch等后加es,例：wash-washes,watch-watches,dress-dresses
⑶在y结尾的单词后：①y前是元音字母,直接加s ,例：buy-buys,enjoy-enjoys
②y前是辅音字母,变y为i加es,例：fly-flies,try-tries,study-studies
在小学英语语言知识中出现了第三人称单数,有主语的三单,动词的三单。学生分不清楚,牵连到三单就手忙脚乱，下面是我整理的英语什么是三单，欢迎阅读。
英语什么是三单是指英语中第三人称单数形式
英语三单变化规则三单的变化，普通的+s，
单词结尾y，y是辅音字母，去y+ies(fly flies) y前面为元音字母,直接+s (play plays) 以s x sh ch o结尾+es(kiss kisses)
特殊变化 (have has)
英语三单口诀一般情况动词尾-s加。 O,s,ch,sh结尾?-es?没有差。 辅音加y 去y为?-ies?是方法
三单形式的练习题
一、写出下列动词的第三人称单数
drink _____ go ______ stay ______ make _____
look ______ have_____ pass_____ carry ____
come________ watch______ f ly ______
study_____ do________ teach_______
二、用括号内动词的适当形式填空。
1、 I________( be )a student .
2、You________( be ) a worker .
3、 ________( be ) he a teacher ?
4. He often ____( go ) to school by bike .
5____you usually ____( get ) up at seven in the morning ?
6、She sometimes _______( do ) his homework at school .
7、______ Lucy __ ____( play ) basketball every day ?
8. They ___________( go ) to see their parents every month .
三、按照要求改写句子
1. Daniel watches TV every evening.(改为否定句)
______________________________________________
2. I do my homework every day.(改为一般疑问句，
作否定回答________________________________
___________________________
3. She likes milk.(改为一般疑问句，作肯定回答
一、写出下列动词的第三人称单数
drink ___ __ go ______stay ______ make ______look ______ have_____ pass_____ carry ____ come________ watch____ __ fly ____ __ study_____ do_________ teach_______
二、用括号内动词的适当形式填空。
1、 I________( be )a student .
2、You________( be ) a worker .
3、 ________( be ) he a teacher ?
4. He often ____( go ) to school by bike .
5____you usually ____( get ) up at seven in the morning ?
6、She sometimes _______( do ) his homework at school .
7、______ Lucy __ ____( play ) basketball every day ?
8. They ___________( go ) to see their parents every month .
三、按照要求改写句子
1. Daniel watches TV every evening.(改为否定句)
______________________________________________
2. I do my homework every day.(改为一般疑问句，
作否定回答________________________________
___________________________
3. She likes milk.(改为一般疑问句，作肯定回答
4. Amy likes playing computer games.(改为一般疑问句，作否定回答) ___________________________________________
5. We go to school every morning.(改为否定句)
_____________________________________________
6. He speaks English very well.(改为否定句)
____________________________________________
7. I like taking photos in the park.(对划线部分提问)
____________________________________________
8. John comes from Canada.(对划线部分提问)
___________________________________________
9. She is always a good student.(改为一般疑问句，作否定回答) ___________________________________________
10. Simon and Daniel like going skating.(改为否定句)
____________________________________________
4. Amy likes playing computer games.(改为一般疑问句，作否定回答) ___________________________________________
5. We go to school every morning.(改为否定句)
_____________________________________________
6. He speaks English very well.(改为否定句)
____________________________________________
7. I like taking photos in the park.(对划线部分提问)
____________________________________________
8. John comes from Canada.(对划线部分提问)
___________________________________________
9. She is always a good student.(改为一般疑问句，作否定回答) ___________________________________________
10. Simon and Daniel like going skating.(改为否定句)
____________________________________________
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 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.
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.
15. I _______(be) ill. I'm 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?
- It's Saturday.
四、改错(划出错误的地方，将正确的写在横线上)
1. Is your brother speak English? __________________
2. Does he likes going fishing? __________________
3. He likes play games after class. __________________
4. Mr. Wu teachsus English. __________________
