2) no sooner …than… , hardly…when… 主句中用过去完成时
我刚一到家天就下雨了。
她刚做完试卷,铃声就响了。 他刚走进教室,老师就开始讲课了。
She had hardly finished the test whenthe bell rang.
He had hardly entered the classroom when the teacher began his lecture.
I had no sooner got home than it began to rain.