Is there much water in your glass?
There isn't much milk in the bottle.

There's a lot of milk in the jar.

Note: We also use 'lots of' instead of 'a lot of', especially in spoken English, and that there is no difference in their meanings.

Affirmatives

In affirmative clauses we sometimes use much and many in more formal styles:

1. There is much concern about drug addiction in the US.

2. He had heard many stories about Yanto and he knew he was trouble.

In informal styles, we prefer to use lots of or a lot of:

I went shopping and spent a lot of money.

Not: I went shopping and spent much money.