肯定句
I am watching TV.
She is cooking.
He is reading.
We are playing football.
They are playing basketball.
否定句
They aren't looking at the blackboard.
The students aren't running now. They are playing football.
She isn't listening to the radio.
No, Jack is doing his homework in the classroom.
They are not flying kites in the park.
疑问句
What are you doing？
Is he cleaning the room now？
What is your mother doing？
Where are you going？
What are they doing？
这些句子涵盖了现在进行时的各种用法，包括描述当前正在进行的动作、状态以及回答关于正在发生的事情的问题。希望这些例子对你有所帮助。