a lot of, lots and a lot

a lot of, lots or a lot?
In spoken English we often use lots of or a lot
of. In written English, it is more common to write
many (for countable plural nouns) or a great deal
of (for uncountable nouns) in positive statements.
A common mistake is to use lot of. For
example, "There are lot of accidents on this road". To avoid making this
mistake, remember either to use a before lot,
or to make lot plural – lots.
We can say either a lot of or lots of before a noun. For example, "There are a lot of people here" or "There are lots of people here". There isn't any difference between the two expressions.
We can also use a lot as an adverb to say how much you do something. For example, "She talks a lot".
A lot is also used in short answers. For example, "Do you like swimming?", "Yes, a lot."