6. She not like cooking very much.

Mistake Correction:

The original sentence is 'She not like cooking very much.'

1. Mistake: The negation 'not' is used incorrectly without an auxiliary verb.
2. Correction: For the third-person singular subject 'She' in the present simple tense, the auxiliary verb 'does' is needed before 'not', and the main verb 'like' should be in its base form.

Corrected sentence: She does not like cooking very much.