1 l am not waiting for a bus.
Am I waiting for a bus?
2 I'm not practising English grammar.
Am I practising English grammar?
3 My teacher isn't listening to me.
Is my teacher listening to me?
4 Leaves aren't falling from the trees.
Are leaves falling from the trees?
5 I'm not watching TV.
Am I watching TV?
6 I'm not sitting on a chair.
Am I sitting on a chair?
7. I don't think hard.
Do I think hard?
8 My classmates are not doing this exercise.
Are my classmates doing this exercise?
9 It isn't raining heavily.
Is it raining heavily?
10 I'm not having tea with my friends.
Am I having tea with my friends?
1. My brother told me a boring story.
I was told a boring story by my brother.
2. Keepers feed the elephants twice a day at the zoo.
The elephants are fed by keepers twice a day at the zoo.
3. No one has identified the man yet.
The man hasn't been identified yet.
4. Someone is servicing my car today (at the garage).
My car is being serviced by someone at the garage today
5. Someone stole my bicycle last week.
My bicycle was stolen by someone last week.
6. Someone cleans the windows of our flat once a month.
The windows of our flat are cleaned by someone once a month.