What Is Negation?
Negation is when you say the opposite of what someone else said or express the negative meaning of a word or sentence.
Two Negative Words
There are two words that are commonly used in English to make a sentence negative:
No
We can use 'no' as a negative answer to a yes/no question.
We can use 'no' before a noun to make a negative sentence and to show negation.
We have
He has
Not
'Not' is the most common word used to show negation. For example:
I am not a student.
The short form of 'not' is 'n’t' and it often comes after auxiliary verbs or modal verbs to make them negative.
She
I