a lot of(或lots of)后可不可以接不可数名词

a lot of为口语，后面可跟可数名词复数形式，也可跟抽象的或表示物质的名词，在否定句中习惯用not many或not much, a lot可以用作状语。
What will you do if you win a lot of money?
如果你赢了许多钱，你将做些什么呢？
Its driver had a lot of trouble trying to stop it.
开这辆车的人很难把它停下来.
I paint a lot of pictures.
我画很多画。

a lot of /lots of是既可修饰可数名词也可修饰不可数名词

可以。

例如： a lot of stuff
a lot of food

a lot of time

lots of meat

都可以