In the grammatically correct sentence, 'I watch a lot of television', the noun 'television' is an uncountable noun. However, it is grammatically incorrect to say 'I watch much television' with the quantifier 'much' for uncountable nouns. My students threw me off with this question and I was unable to answer it. Why is this the case?
It's just a matter of style. We usually use a lot of and lots of rather than much and many in informal affirmative clauses:
- She gave me a lot of information. (rather than She gave me much information).
- I went shopping and spent a lot of money. (rather than I went shopping and spent much money).
Much would sound too formal for the situations above. But it's not that much television is not grammatically correct.