study
studying
eat
eating
The boys/ride their bikes? Yes.
Are the boys riding their bikes? - Yes, they are.
write
writing
you and your friend/do your homework? No/ watch TV.
Are you and your friend doing your homework? No, we aren't. We're watching TV.
Dad/talk on the phone? No / work in the garden.
Is dad talking on the phone? No, he isn't. He's working in the garden.
You/drink coffee? No/drink tea.
Are you drinking coffee? - No, I'm not. I'm drinking tea.
cut
cutting
Mum/cook lunch? - No/ Make sandwiches.
Is mum cooking lunch? - No, she isn't. She's making sandwiches.
sit
sitting