Je gebruikt much en many alleen bij vragen (?) en ontkennende zinnen (-).
Je gebruikt a lot of alleen bij positieve zinnen (+).
(?) Why did you eat many cookies before lunch?
(?) Do you have much homework to make?
(-) She doesn't have many things to do.
(-) No, I don't want much advice from you!
(+) I want to do a lot of exercises if that is possible.
(+) I have a lot of luggage to carry.