Question

6. He is ________ (write) a novel these days.
7. They are _____________ (leave) for Calcutta shortly.
8. It is _______(rain) now.
9. What is she ____________(do) these days?
10. Someone is__________(knock) at the door.​

Answer 1

6. He is writing a novel these days.

7. They are leaving for Calcutta shortly.

8. It is raining now.

9. What is she doing these days?

10. Someone is knocking at the door.

So here the Present continuous tense has been used .

The structure of which is -

Subject + is/am / are + 1st form of verb + ing + object .