they are的缩写形式是they're，意思为他们是。they，代词，他们；她们；它们，作为主语使用。
they
英[ðeɪ] 美[ðe]
pron.他们
例：They are my best friends and I hope I can help them when they are in trouble.
他们是我最好的朋友，我希望可以在他们陷入困难的时候帮助他们。
英语常见的缩写形式I’m=I amshe’s=she ishe’s=he is it’s=it is
we’re=we areyou’re=you arethey’re=they are
there’s=there is there’re=there are
that’s=that isSam’s a student. (Sam’s=Sam is 是)
We’ve got a book.(we’ve got=we have got)
(you’ve got=you have gotthey’ve got=they have got)
She’s got a cat. (she’s got=she has got)
(he’s got=he has gotit’s got=it has got)
isn’t=is notaren’t=are not
wasn’t=was notweren’t=were not
don’t=do not doesn’t=does not didn’t=didn’t
hasn’t=has not haven’t= have nothadn’t=had not
can’t=can not won’t=will not
Let’s go. (Let’s=Let us 让我们)
can not=can't
are not=aren't
