用现在进行时结构是什么？并用am is are加动词ing形式个造一个句

be + v-ing
I am watching tv.
He is reading books.
They are playing games.

现在进行时是am（is，are）＋doing追答

I am writing a letter to my friend.
He is playing basketball with his friends.
We are playing football on the playground.

本回答被网友采纳

be+doing形式追答

I am doing my homework

He is walking around the room

We are playing with our friends

收到了吗？