am/is -- was 祝你学习进步,更上一层楼!请记得采纳,谢谢!(*^__^*)
be的过去式: was were; be:v.有;存在;位于;在(某处);(在某时或某地)发生 扩展资料 Much of the form was not applicable to me.表格中很多部分不适用于我。
A free trade agreement would be advantageous。

be包括am is are,相应过去式为was was were。
1、was 英 [wəz; wɒz] 美 [wəz,wʌz]vt. (动词)是;在(am、is 的过去式)短语 Life was 生活是 ; 生活是…was born 出生于 ;。
be过去分词都是been。
is例句:He is good boy.他是个好孩子。
am例句:I am a teacher.我是一名老师。
are例句:we are friends.我们是朋友。
was例句:The building was constructed from the design of that architect.这。

be动词的过去式是was、were。
was是is和am的过去式,were是are过去式,使用的时候要注意主谓一致。
was和were的例句 Itwasasunnydayyesterday昨天天气晴朗,Theyweretoobusytogoshopping他们太忙,以至于没空去购物,was和were的。