一、many、much、a lot of的用法
many意思是“很多”,与可数名词复数连用;
much意思是“很多”,与不可数名词连用。
a lot of既可与可数名词连用，也可与不可数名词连用。
它们在句中可作主语、宾语和定语等。
I don't have many friends here.
在这里我没有很多的朋友
Many died in the bus accident.
许多人在公交车祸中丧失
There was a lot of mud on the ground.
地上有许多泥。
二、many、much、a lot of的区别
1)many和much的区别在于many + 可数名词，much + 不可数名词。
How many people are there at the meeting?
会议中有多少人?
How much time has we left?
他离开多久了?
Many of the workers were at the meeting.
许多工人在会议中
Much of the time was spent on learning.
花许多时间在学习上。
He has many friends, but few true ones.
他有许多朋友，但靠谱的却没几个。
There hasn't been much good weather recently.
最近都不是什么好天气。
2)a lot of(=lots of)和many、much区别在于它们只能用在肯定句中，而many，much不受限制。
如果将一个含有a lot of(=lots of)的肯定句改为否定句或疑问句，要将它们改为many或much。
We can see a lot of birds in the tree.
We can't see many birds in the tree.
我们在树上看不到很多鸟儿。
He wants lots of soda.
Does he want much soda?
他需要许多汽水吗?
