3 contoh kalimat present continous tense bentuk +,-,?

----Jawaban----
She is playing a piano. (+)
She isn't playing a piano. (-)
Is she playing a piano? (?)

1.
I am watching TV now.
I am not watching TV now.
Am I watching TV now?

2.
She is reading at present.
She is not reading at present.
Is she reading at present.

3.
They are running at the moment.
They aren't running at the moment.
Are they running at the moment?