They _____ playing tennis.
are
aren't
How's the weather?
It's snowy
What are they doing?
They are playing football / soccer.
What is he doing?
He is running
She _____ drinking
is
isn't
What are they doing?
They are eating
What are you doing?
I'm eating
It's a _____
mountain
What are you doing?
I'm running
What is he doing?
He is watching TV.
How's the weather?
It's windy
He _____ going to school.
isn't
is
What are you doing?
I'm swimming
How's the weather?
It's rainy
He _____ playing tennis.
isn't
is
What is he doing?
He is playing tennis.
How's the weather?
It's sunny
The cat ___ playing
isn't
is
What is she doing?
She is reading (a book)
They _____ watching TV
are
aren't
How's the weather?
It's cloudy