Is it possible to use "a lot of, lots of, plenty of" in negative and question sentences. If yes, what is the meaning difference between these sentences...
Do you have much time?
Do you have lots of time?
Do you have plenty of time?
I don't have many problems.
I don't have a lot of problems.
I don't have plenty of problems.
If there is no meaning difference, why there are so much alternative? I mean, if we can use a lot of, lots of, plenty of in all types of sentences (positive, negative, question) why "much - many" exist?