There is a lot of people on the streets(改错）

There is a lot of people on the streets(改错）
There is a lot of people on the streets(改错）

There is a lot of people on the streets(改错）
is改为are
people为复数

are
尽管是a lot of 可用于复数，所以用are

there are a lot of people on the streets

There are a lot of people on the street.
people可数，所以谓语动词用复数。如果接的是不可数名词，那么前面就是单数的谓语动词~
而且on the street应该算是个搭配，基本没有用streets 的~~