句子加什么之类的就是比如run就是加重写加ing就变成running.

　　(1)主语为非三单,时态为一般现在时态,动词为原形

　　例如：Irunsofast---Doyourunfast

　　Werunfast---Doyourunfast

　　Theyrunfast--Dotheyrunfast

　　(2)主语为三单,时态为一般现在时态,动词为动词加S,ES

　　例如:Tomspeaksquickly----DoesTomspeakquickly?

　　Shewalksslowly-----Doesshewalkslowly?

　　Hegoestoschooleveryday.---Doeshegotoschooleveryday

　　(3)主语为三单/非三单,时态为进行时态,助动词BE+DOING形式

　　例如：HeiswatchingTVnow.----IshewatchingTV?

　　Iamplayingthepiano.

　　Sheisdoingherhomework.

　　WearelearningEnglishnow.

　　Tomisswimmingintheriver

　　Jackisrunningtogreethisparents.

　　Sheisgettingreadyforhiscomingexamination.

　　有疑问继续追问,