Main body: is good for your example makes better example improves and you feel example is good for your example​

1. The boys are running about the garden.
2. I am doing my homework.
3. John and his friends are going to the library.
4. Ann is sitting at her desk. She is studying geography.
5. A young man is standing at the window. He is smoking a cigarette.
6. The old man is walking about the room.
7. The dog is lying on the floor. 
8. Are you having a break? 
9. What language are you studying? 
10. Who is lying on the sofa? 
11. What are they talking about? 
12. It is still raining.

1 My book is  lying on the table.
2 They are  working.
3 The doctor and her patient are  talking.
4 We are cooking dinner. My mother is making a salad.
5 A young man is driving a car. He is listening to music.
6 My grandfather is reading a book.
7 The pen is lying in the floor.
8 Are you having a break?
9 She is still singing.

1 Are the boys running about in the garden.?
2  am I doing
3. Are John and his friends going to the library?
 4. Is Ann sitting at her desk.? Is she studying geography?
 5. Is a young man standing at the window?Is  he smoking a cigarette?
 6. Is the old man walking about the room?
 7. Is the dog lying on the floor?
 8. Is he having a break?
9. Are we  studying Japanese?.
10. Is my mother lying on the sofa.?

1 aren't running
2 aren't (ain't) doing
3 aren't going
4is not sitting
5 isn't standing
6 isn't walking
7 is not lying
8 isn't having
9 aren't studying
10 isn't lying