are的过去式是were。are是be的第二人称单复数现在式，am和is是单数形式；am，is的过去式是was，are的过去式是were。过去分词都是been。

are的过去式例句：

1、We were all badly bitten by mosquitoes.

我们都被蚊子咬惨了。

2、Engineers noticed that the pipeswere not expanding as expected.

工程师注意到管道并没有如预期那样膨胀。

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

他们交往大概有一年了。