there are和they are的区别

There are的释义为某处（某时）有某人（某物），搭配可数名词复数形式，是引导词组。

They are的释义为他们是，搭配可数名词复数形式或副词，是主谓词组。

例句

There are so many different makes to choose from.

有很多不同的`型号可供选择。

There are some obvious practical applications of the research.

这项研究有一些明显的实际用途。

They are much better off than us.

他们比我们富得多。

They are here because of us.

他们是因为我们来这里的。