no sooner …than的用法,前后时态的用法

no sooner。than 固定用法"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)