lots of 和a lot of的用法

lots of修饰可数和不可数名词
a lot 副词 如：thanks a lot
a lot of只能修饰可数名词

lots of:后既可以加可数名词复数又可加不可数名词

许多

例句与用法:
He's lots of run.
他很风趣。
There are lots of dunes in the desert.
沙漠里有许多沙丘。
There were lots of buffaloes in the North America 100 years ago.
100年前，北美有大量的野牛。
I've got lots of famous footballers' autographs.
我有许多著名足球运动员的亲笔签名.
You have lots of time to finish the work.
你有充裕的时间来完成这项工作。

a lot of: 后只能加可数名词的复数形式

许多

例句与用法:
It takes a lot of labor to build a railway.
修筑一条铁路要花费许多劳动力。
China does a lot of trade with many countries.
中国和许多国家进行多方面贸易。
I'm under a lot of pressure.
我的压力很大。

楼上明显错了
lots of 和a lot of都既可以修饰可数名词，也可修饰不可数名词。

lots of=a lot of

前面的回答都很好，不过现在也有很多人说a lot of money,虽然money没有单复数形式。

lots of=a lot of
they are the same. both are used to modify both co