no sooner than有没有什么时态要求

　　no sooner...than..."一...就..."
　　引导时间状语从句,主句用过去完成时,"than"后面的从句用一般过去时.(从这里可以知道,no sooner后面是主句;than后面是从句)
　　例:
　　I had no sooner reached home than it began to rain.
　　我一到家天就下起雨来
　　No sooner ...than...常放在句首,表示强调.这时主句要倒装.
　　例:No sooner had I reached home than it began to rain.
　　与这个短语类似的还有 hardly ...when
　　意思为:"还没...就..."
　　例:
　　We had hardly gotten there when it began to rain.
　　我们还没到那儿,天就下起雨了.
　　(主句用过去完成时,从句用一般过去时)
　　Hardly...when...也常放在句首
　　例:
　　Hardly had we gotten there when it began to rain.
　　就是这样