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：I run so fast---Do you run fast
We run fast ---Do you run fast
They run fast --Do they run fast
(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:Tom speaks quickly ----Does Tom speak quickly?
She walks slowly -----Does she walk slowly?
He goes to school every day .---Does he go to school every day
(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：He is watching TV now.----Is he watching TV?
I am playing the piano .
She is doing her homework.
We are learning English now.
Tom is swimming in the river
Jack is running to greet his parents.
She is getting ready for his coming examination.
有疑问继续追问,