Practice
A. Change the following sentences from affirmative to negative.
1. The telephone is ringing. The telephone is not ringing. The telephone isn't ringing.
2. It is beginning to rain. ________
3. The sky is getting very dark._______
4. She is working on the fourth floor at present. _______
5. The maid is cleaning the room now.____
6. They are taking a walk in the park.____
7. You are having lunch outside. ______
8. John is doing well in his studies at present. _________
9. We are laughing at what you said.______
10. They are traveling in Europe at present. 11. I am taking dancing lessons.. ______
12. The leaves are beginning to fall from the trees. _______
13. All the birds are flying south.______
14. Ellen is writing a series of articles on the economic situation.________​