are的過去式是were。are是be的第二人稱單復(fù)數(shù)現(xiàn)在式，am和is是單數(shù)形式；am，is的過去式是was，are的過去式是were。過去分詞都是been。

are的過去式例句：

1、We were all badly bitten by mosquitoes.

我們都被蚊子咬慘了。

2、Engineers noticed that the pipes were not expanding as expected.

工程師注意到管道并沒有如預(yù)期那樣膨脹。

3、They were knocking around together for about a year.

他們交往大概有一年了。

are雙語例句

Are you aware these notes are counterfeit?

你覺察到這些鈔票是偽造的嗎？

Clubs are trumps.

梅花是主牌。

Snakes are carnivorous.

蛇都是食肉動(dòng)物。

No, those are Ellie's kids. Ours are upstairs.

不，那些是埃利的孩子。我們的都在樓上。

Certain courses are compulsory, others are optional.

某些課程是必修的，其他是選修的。