Affirmative Sentence Into Negative Analysis

Change the following affirmative sentences into negative.
1. John has fallen ill.
2. He smokes.
3. The thief was hiding behind a tree.
4. He was telling the truth.
5. They made her queen.
6. The roof was blown off in the storm.
7. You look happy.
8. The milk turned sour.
9. The peon rang the bell.
10. She has a lovely voice.
11. The rumor seems true.
12. We waited at the station.
13. She called me a fool.
14. They had finished their work.
15. John broke another glass today.

Answers
1. John has not fallen ill.
2. He does not smoke.
3. The thief was not hiding behind a tree.
4. He was not telling the truth.
5. They did not make her queen.
6. The roof was not blown off

>>> My mother is looking after the children
Who mended the window? >>> My brother mended the window
Who could have done this? >>> Anybody could have done this.

We use what in the same way:
What will happen?
What caused the accident?
What frightened the children?
When we ask who, which and what about the object of the verb (see Clauses, Sentences and Phrases), we make questions in the way described in 1 and 3 above with who, which or what at the beginning of the clause:

He is seeing Joe tomorrow >>> Who is he seeing tomorrow?
I want a computer for my birthday >>> What do you want for your birthday?
She has brought some fruit for the picnic >>> What has she brought for the picnic?
They need a new car >>> What do they need?

We sometimes use which or what with a noun:

What subjects did you study at school?
What newspaper do you read?
Which newspaper do you read – the Times or the Guardian?
Which book do you want?

Questions with how:

We use how for many different questions:

How are you?
How do you make questions in English?
How long have you lived here?
How often do you go to the cinema?
How much is this dress?
How old are you?
How many people came to the