was是be动词的过去式
一、作助动词:
1、 现在分词,构成过去进行时态:
He was reading.
2、过去分词,构成被动语态:
He  was  kidnapped  by  a  thief.
They were defeated.
二、作系动词
3、 现在分词、动名词短语作表语:
The film was moving.
His job was teaching English .
4、 过去分词作表语:
We were moved.
5、不定式作表语:
1)有to不定式:His work that day was to clean the blackboard.
2) 无to 不定式:What he should do is clean the blackboard
he was后面动词什么形式
he was+动词的过去分词,表示被动语态
可以加+ed +ing 形容词,绝对不能+s 或什么都不加(除非省略)
was是系动词,他的后边加什么做表语取决于句子意思,可以加形容词,可以加相当于形容词的词,比如过去分词(可不是过去式哈),或者现在分词(就是你说的ing),但是不能加原形。