On the third person singular of English Verbs When there are does in the sentence, the third person singular verb is reduced. When there are do, don't, do you still use the third person singular verb For example, I do not think he likes music?

On the third person singular of English Verbs When there are does in the sentence, the third person singular verb is reduced. When there are do, don't, do you still use the third person singular verb For example, I do not think he likes music?

I do not think he likes music.
Think is an adverbial clause, followed by a declarative sentence~