number of /lots of /a lot of /huge amounts of/amount of 等加单数复数

number of
a lot of
lots of
huge amount of
amounts of

number of:
(1)a number of 复数（许多）
(2)the number of复数(一些）
lots of;a lot of复数（许多）
huge amount of;amount of单数
注：区别于number of

a number of /lots of /a lot of 意思都是许多，后面加复数。
the number of的意思是“...的数量”，后面加单数。
huge amount of/amount of后面也是加单数。