was+动词过去式是什么语法例如 The new supermarket was built two years ago

was+动词过去式是什么语法例如 The new supermarket was built two years ago was+动词过去式是什么语法 have+动词过去式是什么语法?例如I have knew it.是不是错误的?注意我说的是过去式不是过去分词. 动词过去式+to+be是什么语法?比如 used to be 谓语动词是过去式动词也是过去式?谓语动词如果是过去式那么后面跟的动词也要过去式吗?例如：I WAS LOSE MY KEY还是 I WAS LOST MY KEY 英语简单的语法When +v.(过去式),后面的句子动词应该用?was/were v.ing 还是v.过去式? 请问 动词被动式 后面的 by 是什么词性,做什么成分,例如The homework was assigned by the teacher. was+动词ing还是加动词过去式? was+动词ing跟动词过去式有什么区别主语+was+动词ing 跟 主语+动词过去式+宾语 有什么区别?比如：I was having lunchI had lunch（要有语法的解释,清楚明了!） 过去式句子动词后面的动词用什么形式?The girl was _____(sing). she was going to quit the job.为什么用WAS 过去式当BE动词? be+名词+to+动词 这是什么结构啊例如the girl was able to explain what had happened to her. was的过去式是什么 was的是什么过去式 couldn't后面是不可以加动词过去式?这是什么语法? 英语语法are to be assembledare to be +动词过去式 是什么语法呢 语法过去式什么情况下两个动词都变成过去式? 有点语法不懂.there the feed for the cows and other animals was kept 为什么be动词后面可以加过去式啊?还有一句话是说 什么什么东西is made of什么什么