I don’t have many friends here.(在这里我没有很多的朋友。)
We can learn much with the help of him.(在他的帮助之下我们能学到很多)
many和much一般用于否定句,肯定句中通常用a lot of 或者lots of; many / much用于肯定句时可以在前面加上so、very或too.如:
There are a lot of people on the playground.(操场上有许多的人)/
They haven’t got much work to do.(他们没有多少事情可做) /
There are too many people in the room.(房间里人太多了。)

(2)few、little、a few、a little的用法:
few、little意思是“很少几个”、“几乎没有”,有否定的意思,a few、a little意思是“有几个”、“有些”,有肯定的意思 ;few、a few与可数名词连用或代替可数的事物, little、a little与不可数名词连用或代替不可数的事物。它们在句中可作主语、宾语和定语。如:
He is very poor and he has little money.(他很穷,几乎没有什么钱。) /
Don’t worry. There is still a little time left.(别着急,还有一点儿时间呢。) /
In that polar region there live few people.(在那个极地地区几乎不住人) /
You can get a few sweets from him.(你可以从他那儿弄到一些糖果)