Exercise 14. Put the verb in brackets into the Present continuous and the Present Indefinite. 1. 1. Who (knock) at the door? 2. It (rain), take your
umbrella. 3. Don't bother me, please, I (work). 4. Run
downstairs, your sister (wait) for you. 5. What you (think)
of at this moment? 6. Let's have some tea. It (get) chilly.
7. Keep quiet, we (listen) to the music. 8. "What Tom (do)
now?" "He (play) the violin." 9. It is a lovely day. The
sun (shine) brightly. 10. What you (look) at?​

1. Who is knocking at the door?

2. It is raining, take your  umbrella.

3. Don't bother me, please, I am working.

4. Run  downstairs, your sister is waiting for you.

5. What do you think of at this moment? [Глагол 'think' не употребляется в Continuous]

6. Let's have some tea. It is getting chilly.

7. Keep quiet, we are listening to the music.

8. "What is Tom doing  now?" "He is playing the violin."

9. It is a lovely day. The  sun is shining brightly.

10. What are you looking at?​

Present Continuous Tense используется для указания, что действие происходит прямо сейчас.