它们都有“大量的,许多的”意思。plenty of/lots of/a lot of后既可修饰可数名词复数,也可以修饰不可数 lots of=a lot of 后面接可数名词和不可数名词均可,接可数名词时谓语用复数,接不可数名词时,谓语用单数。 a lot当然不是名词性短语了,而是副词性短语,修饰动词。 比如:thanks a lot.= thanks very much. 再比如:i know him a lot。 plenty of 和以上lots of 和a lot of相似,后面接可数名词和不可数名词均可,接可数名词时谓语用复数,接不可数名词时,谓语用单数。
a lot of,lots of,plenty of 这三个短语都表达“许多;大量”,而且都可以修饰可数和不可数名词。一般也可相互替换。 例如: There are a lot of/lots of /plenty of people on the beach. There is a lot /lots of /plenty of rain in this area each year. 祝你开心如意!