当主语为第三人称单数时，要用does构成一般疑问句。如：

　　- Does she go to work by bike?

　　- Yes, she does. / No, she doesn't.

　　动词 s的变化规则

　　1．一般情况下，直接加-s，如：cook-cooks, milk-milks

　　2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes

　　3．以“辅音字母 y”结尾，变y为i, 再加-es，如：study-studies

　　一般现在时用法专练:

　　一、写出下列动词的第三人称单数

　　drink ________ go _______ stay ________ make ________

　　look _________ have_______ pass_______ carry ____

　　come________ watch______ plant_______ fly ________

　　study_______ brush________ do_________ teach_______

　　wash_______

　　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.