爱华网大家都知道，在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-es。但有些同学们对于哪些主语是第三人称单数还不十分清楚，现归纳总结如下：
一、人称代词he, she, it是第三人称单数。如：
1. He likes cars. 他喜欢车。
2. She goes to school at seven. 她七点去上学。
3. It has a good name. 它有一个好名字。
二、单个人名、亲朋好友等称呼作主语 是第三人称单数。如：
1. Pat never throws rubbish on the floor. Pat从不在地板上扔垃圾。
2. Miss Wang waters the flowers once a day. 王老师给花一天浇水一次。
3. Aunt Mary usually makes cakes. 玛丽阿姨经常做蛋糕。
4. My mother washes the dishes everyday. 我妈妈每天都洗碗。
三、第三人称单数形式的构成
1.一般直接在词尾加 s，如：work-workslive-lives make-makes
2.以s, x, ch, sh等结尾的单词加 es , 如：miss-misses fix-fixes
i.finish-finishes teach-teaches
3.以辅音字母加o结尾的单词，加es如: go-goesdo-does
4. 特殊变形的有：have-has
四、问句：问句中遇到第三人称单数时，需要用助动词does,动词变为原形。
What does she like?
When does he brush his teeth?
How often does your sister comb herhair?
练习一、将括号里动词的适当形式填入横线上。
1.I ________ in the corridors. (walk)
2.He _________ in the corridors. (run)
3.She ___________ her face once a day. (wash)
4.They ____________ their teeth once a day. (brush)
5.You ___________ up your clothes once a day. (hang)
6.We ____________ our home work once a day. (finish)
7.He ____________ rubbish in the classroom. (throw)
8.She _____________ rubbish on the floor. (throw)
9.I _____________ rubbish in the bin. (throw)
10. They___________ the table once a day. (set)
11. Peternever _________ in the corridors. (run)
12. Maryusually _________ the table. (set)
13. Pat andKen _________ the plants in the morning. (water)
14. The boy__________ his hair once a day. (comb)
15. MissCheng _________ TV at home. (watch)
16. My sister__________ his schoolbag once a day. (pack)
17. My mother_________ dinner for me. (cook)
18. Myparents _________ the house at Chinese New Year. (clean)
19. Myteachers _________ us some gifts. (give)
20. Myfriends _________ the table with me. (set)
练习二、选择正确的单词填到括号里。
1.What does Candy __________ (wants,want) to be ?
2.You __________ (should,shouldn’t) be quiet in the library.
3.He shouldn’t ___________ (throw,throws) rubbish on the floor.
4.Peter ___________ (help,helps) his mother at home.
5.She never _________ (run,runs) in the corridors.
6.We should __________ (walks,walk) in the corridors.
7.He _________ (don’t,doesn’t) get up early.
8.How often __________ (do,does) your father go to bed?
练习三、将下列句子改成第三人称He的句型（看例句）
例句：I brush my teeth once a day. ----改：He brushes his teeth once a day.
1.I comb my hair twice a day.
_____________________________________________________________
2.They go to school at six in the morning.
_____________________________________________________________
3.You wash your face and put on your clothes.
_____________________________________________________________
4.When do you get up?
_____________________________________________________________
5.How often do you hang up your clothes?
_____________________________________________________________
