Question

I knew that I must tell this man the truth. (Rewrite as negative sentence)

Answer 1

Answer:

I knew that I mustn't hide the truth.

OR

I knew that I must not tell lie to this man.

Answer 2

I knew that I must tell this man the truth.

The negative form of this sentence will be:

I knew that I must not tell this man the truth.

To convert a given sentence into negative form we usually add the word 'not' after the helping verb.

Helping verbs in an sentence are those words which help the main verb in a sentence and extend the meaning of the verb.

So to convert the given sentence into a negative sentence we will add a 'not' before the helping verb 'must'.

The negative form of the sentence will be: I knew that I must not tell this man the truth.