四种形式 现在分词being

过去式were

过去分词been

原型be

here we are

我们到了

you are welcome

别客气不用谢

all bets are off

世事难料

two heads are better than one

两人智慧胜一人三个臭皮匠， 顶个诸葛亮

when the chips are down

在危急关头， 在关键时刻

lips are sealed

守口如瓶闭口不谈

such as they are