was 加动词ed是什么时态

　　肯定形式：

　　主语+动词过去式+其它

　　例句：She came to help us in those days．

　　否定形态：

　　主语+didn't +谓语动词原形+其它

　　1.在行为动词前加didn't，同时还原行为动词

　　例句：I didn't know you like coffee.

　　一般疑问句：

　　①Did+主语+谓语动词原形+其它

　　②Was/Were+主语+表语

　　例句：Did you do homework?

　　特殊疑问句：

　　特殊疑问词+ did+主语+动词原形+其它？

　　特殊疑问词+was/were+物主代词/...'s+sth.？

　　被动语态：

　　主语 + was / were + 动词的过去分词。