1. Have we done our homework ?
Who has already done homework ?
What have we done ?
2. Who was cooking soup at 5 o'clock yesterday ?
What was she cooking at 5 o'clock yesterday ?
When was she cooking soup ?
3. Are there 40 students at the conference ?
How many students are at the conference ?
Where are 40 students ?
It has been sent by them to a laboratory.
It was being examined by scientists all through the night.
It has been discovered that it is the skeleton of a dinosaur from thousands of years ago.
Tests are still being done by them.
It is going to be sent to a museum when the tests have been completed by them.
1. Did he study English last year?
2. I do a lot of exercises in the morning.
3.Who is talking on the phone now?
4. Have you ever been to London?
5. What will you have for breakfast tomorrow?