行為動(dòng)詞的變化。

　　肯定句：主語(yǔ)+動(dòng)詞原形(+其它)。

　　否定句：主語(yǔ)+ don't( doesn't ) +動(dòng)詞原形(+其它)。

　　如：I like bread. I don't like bread.

　　當主語(yǔ)為第三人稱(chēng)單數時(shí)，要用doesn't構成否定句。

　　如：He ofter plays football.

　　He doesn't often play football.

　　一般疑問(wèn)句：Do( Does ) +主語(yǔ)+動(dòng)詞原形+其它。(句首加助動(dòng)詞do, does)

　　如：I often play football.

　　- Do you often play football?

　　- Yes, I do. / No, I don't.

　　當主語(yǔ)為第三人稱(chēng)單數時(shí)，要用does構成一般疑問(wèn)句。

　　如：She goes to school by bike.

　　- Does she go to school by bike?

　　- Yes, she does. / No, she doesn't.

　　特殊疑問(wèn)句：疑問(wèn)詞+一般疑問(wèn)句。

　　如：She goes to school by bike.

　　Does she go to school by bike?

　　How does she go to school?

　　動(dòng)詞+s的變化規則

　　1.一般情況下，直接加-s，如：cook-cooks, milk-milks

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

　　3.以“輔音字母+y”結尾，變y為i, 再加-es，如：study-studies