no sooner had they come back home than it started to rain翻译成汉语!为什么这里的THAN 不能用WHEN?
问题描述：
no sooner had they come back home than it started to rain翻译成汉语!为什么这里的THAN 不能用WHEN?
答
no sooner .than 是固定短语,约定俗成的,所以不能换