肯定句

I am watching TV.

She is cooking dinner.

They are playing football.

He is reading a book.

We are having a meeting.

否定句

They aren't looking at the blackboard.

She isn't listening to the music.

We aren't going to the park.

He isn't doing his homework.

They aren't playing basketball.

疑问句

What are you doing？

Is he cleaning the room now？

Where are you going？

What are they doing？

Are you watching TV？

这些句子涵盖了现在进行时的基本用法，包括肯定、否定和疑问形式。希望这些例子对你有所帮助。