什么叫做“a lot of 为名词性”

什么叫做“a lot of 为名词性” a lot of后面接什么词性? so many 已成固定搭配,a lot of 虽相当于 many,但 a lot of 为名词性的,只能用such搭配 a lot of的词性? a lot of的词性是什么 a little,a bit,a little bit,a lot of ,a few 分别修饰什么词性. thanks a lot 中的thanks 什么词性 a lot of 什么词 plenty of、a lot of、a lot有什么区别? a lot A LOT是什么词性? have been to,lot,a lot of...以上单词词性是什么? lot of,lots of,a lot,a lot of有什么区别?