当主语是第三人称单数时，动词形式有以下几种变化：
规则 | 动词原形 | 第三人称单数形式 |
一般动词在词尾加-s,在清辅音后读/s/，在 浊辅音或元音后读/z/，在t后读/ts/，在d 后读/ds/。 | help like swim listen know play get find | helps /helps/ likes /laiks/ swims /wimz/ listens /’lisənz/ knows /nəʊz/ plays /pleiz/ gets /gets/ finds /faindz/ |
以字母s, x, sh, ch结尾的动词加-es, 读/iz/。如果动词原形词尾已有e，则加s。以o结 尾的动词也加-es，读/z/。 | teach go | teaches goes |
以辅音字母加y结尾的动词，先边y为i， 再加-es，读/z/。 | study | studies |
sit-- guess-- die-- go-- rush-- reach-- touch-- brush-- fly-- copy-- say-- run-- do-- fix-- live-- cry-- enjoy-- have-- wish-- play-- Tie-- teach-- buy-- study-- drink-- go-- stay-- make-- look-- carry-- come-- watch-- plant-- fly -- do--
二、用括号内动词的适当形式填空。
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
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