Нужно образовать вопросиельную и отрицательную форму They are translating a test
He is writing a letter at thu s
We are playding tennis now s

They don't translating a test . Do they transating a test?

He doesn't writing a letter at thus. Does he writing a letter at thus?

We don't playing tennis nows. Do we playing tennis nows?

1.They aren't translating a test

Are they translating a test?

2. He isn't writing a letter at the moment.

Is he writing a letter at the moment?

3. We aren't playing tennis now.

Are we playing tennis now?