例句：NO sooner had he reached the classroom than the bell rang,书上说是过去完成式，可是应该由had + 动词过去分词构成啊？可这个句子的had he 是怎么回事？
热心网友
这是一个倒装句，no sooner …than 要倒装he 是句子主语，had reached 是句子的谓语，绝对正确的过去完成时NO sooner had he reached the classroom than the bell rang.
热心网友
同意楼上的