1）lots of和a lot of可以当做定语,即当做many或much那样来使用.因此,谓语动词的数不是依据lot和lots来决定,而是依据of所引导的名词的数来决定,如：
A lot of time has been wasted.有许多时间给浪费掉了.(a lot of=much)A lot of people have been present.已有许多人到了.（a lot of=many）There is lots of time to spare.时间绰绰有余.(lots of=much)（2）a lot of=lots of表示”许多的“,可以修饰可数名词复数和不可数名词.（3）a lot是表示程度的一个短语,意为”很,非常“.如：thanks a lot(多谢)；know a lot about China（对中国了解很多）(4)书面语用a lot of较多,口语用lots of较多.
