Much and many are simply words that have to do with a large amount of an object. If the object is a "Count noun" you use "many" as in "Many bananas" or "Many people". If the object is a "non-count noun", then you use "much" as in "much time" or "much emotion". A good test for this would be objects that you can put numbers in front of. For instance: You can say "I have 3 bananas" but you can not say "I have 3 time". Regardless of whether the sentence is a positive, negative, or question sentence, it is okay to use both "much" and "many" as long as they are used with the correct nouns. Hope this helps :)

Strangely, someone asked about this yesterday: http://www.italki.com/question/285264 Did you see this in a newly released textbook or website? I'd never heard of this "rule" before yesterday, and it's really odd that it's come up twice now.

Good morning, yesterday I read this sentence: "he studies very much". I know it's incorrect, the correct versions are: "he studies a lot" or "he studies very hard", but can we consider this sentence acceptable or is it totally wrong? Maybe it can be a version used by non-native speakers....tell me please!