no sooner than 和hardly when以及as soon as的区别：
1、从两件事间隔的时间看，as soon as 最长，"A事发生后，就做B事"；no sooner...than 次之，"刚做完A事，就做B事"；hardly...when最短，"几乎未来得及做完A事，紧接着就做B事"。
2、as soon as较常用，在句中的位置很灵活。意思相当于“A事情发生以后，就做B这件事”。 口语和书面语都可以。特点是，在句子中的位置比较灵活，而且可以用于各种时态。例如：
I’ll write you as soon as I get there.
我一到那儿就给你来信。（一般现在时）
As soon as I went in, Katherine cried out with pleasure.
我一进门，Katherine 就高兴的叫起来。（一般过去时）
I’ll return the book as soon as I have read it.
我一读完就把书还回去。（现在完成时）
3、as soon as可用于各种时态；而在no sooner...than...和hardly…when…句型中，主句一般要用过去完成时，than或when后面的从句常用一般过去时。例如：
Hardly had I finished eating when he came in.
我刚吃完他就进来了。
No sooner had the game started than it began to rain heavily.
运动会刚开始，天就下起了大雨。
扩展资料
no sooner than
例句：
For a big party, unless you know the person well, come no sooner than the starting time.
如果是派对，除非你和主人很熟悉，不要比规定时间到的早。
hardly when
例句：
The sun had hardly appeared when we got up.
太阳刚露头儿，我们就起来了。
as soon as
例句：
He got married as soon as he graduated.
他一毕业就结婚了。
