be的过去时复数和第二人称单数形式;有时代替 was,用于条件从句、动词 wish 之后等;
例句:
These reforms were in the best interests of local government.
这些改革对地方政府最有利。
They were promoted to the First Division last season.
上个赛季他们晋升为甲级队。
What in the world did they think they were doing?
他们到底认为自己在做什么?