meaning of 'at all'

Question: A student in China asked, “Can at all be used in a positive context?”

Answer

The expression at all is used to intensify a statement or question—that is, to make it stronger. 

It is common in negative statements and questions, where it means “in any way” or “even slightly.” It is also used occasionally in positive statements, where it means something like “absolutely.”

Below are some example sentences with at all.

How to use the words all and the whole correctly

How to use the words all and the whole correctly.

All
We use all (of) to express the total number or amount of something.	all (of) my friends, all (of) the time All (of) my friends visited me in the hospital.
We usually use all (of) with uncountable nouns.	all (of) the money, all (of) the oil She has spent all (of) the money on cosmetics.
We usually use all of with personal pronouns it, them, etc.	all of them, all of it Have you invited all of them?
All is usually placed after the personal pronounwe, they, them, us.	we all, they all We all enjoyed the concert.