1.large numbers of 后面只能加可数名词复数.
该结构做句子主语时,谓语动词用复数形式.
如：Large numbers of people were waiting at the railway station.
2.many 后面也只能加可数名词复数,做主语时谓语动词也用复数.
其用法类似于large numbers of.
如：There are many students in this school.
不过,many还可做代词（相当于名词用法）,但是large numbers of不可以.
如：--How many books are there in the library?--Too many.(= Too many books.)
3.lots of既可加可数名词复数,也可以加不可数名词.
该结构做句子主语时,谓语动词的数和其后的名词保持一致,即：加可数名词复数时动词用复数,加不可数名词时动词用单数.
如：There is lots of money in the bank.
There are lots of customers in the bank.
4.a great quantitiy of后面既可以加可数名词复数,也可以加不可数名词.
该结构做句子主语时,无论其后加可数名词还是不可数名词,谓语动词一律用单数形式（和quantity一致）.
如：A great quantity of students is getting ready for the exam.
A great quantity of water flows into sea.
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