a lot of和a number of的区别是什么？

a number of 和a lot of 用法区别：

a lot of既可以修饰不可数名词也可以修饰可数名词的复数形式，可以相应地换为much和many。

a number of 只可以修饰可数名词复数形式(它修饰的词作主语时谓语用复数形式)可以换为some、many、a lot of、plenty of。

a number of相关知识点

a number of后面接可数名词复数。a number of接了可数名词复数做主语时，谓语用复数。a number of：若干，一些，许多。强调多，相当于a lot of。the number of ……的数量。说明……的数字或是数量。They have retrained a number of young technicians for our factory.

a number of表示“许多”,相当于many,修饰可数名词复数.作主语时,谓语动词用复数.number前可用large,small等修饰,以表示程度。

例如：A number of students are planting trees on the hill．许多学生在小山上植树。

扩展阅读：xbox series x国行 ... a jar of ... a bowl of noodles ... a thousand of ... have classes ... a lot of和much可以互换不 ... a variety of ... a large quantity of ... lots of many ...