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no sooner后面是主句;than后面是从句。请看例句：
No sooner had I sat down than there was a loud knock on the door.
我刚坐下就有人大声敲门。
He had no sooner got his wings than the Korean conflict broke out.
他刚获得飞行资格，朝鲜战争就爆发了。
No sooner had he arrived in Rome than he was kidnapped.
他一抵达罗马就被绑架了。
We had no sooner set out than a thunder storm broke.
我们出发不久就雷雨大作。
No sooner did she leave my doorstep than I had emails from two women whose kids go to my son's nursery and who recognized my face ．
她刚离开我家门口,我就收到两个女人的电子邮件,她们的孩子跟我儿子在同一家托儿所,她们认得我。
高考真题- 2019 天津
No sooner had we sat down at the table than the phone rang.
我们刚在桌子旁坐下，电话铃就响了。
类似表达还有：
Hardly/scarcely/barely……when/before
We had hardly/scarcely/barely sat down at the table, when/before the phone rang.
我们刚在桌子旁坐下，电话铃就响了。
在正式的书面英语中，尤其在文学体中，上述各词可置于句首，然后将主语和动词的位置倒装：
Hardly/Scarcely/Barely had we sat down at the table, when/before the phone rang.
我们刚在桌子旁坐下，电话铃就响了。
We had hardly sat down to supper when the phone rang.
我们刚坐下用晚餐，电话就响了。
Hardly had she spoken than she regretted it bitterly.
话刚出口，她就后悔不迭。
Hardly had we arrived than the problems started.
我们刚到，问题就来了。《牛津高阶英汉双解词典》
He had scarcely put the phone down when the doorbell rang.
他刚放下电话，门铃就响了起来。
Scarcely had the game started when it began to rain.
比赛才开始就下起雨来了。
Scarcely had they left before soldiers arrived armed with rifles.
他们刚离开，扛着步枪的士兵们就到了。
I scarcely had time to ring the bell before the door opened.
我刚一按门铃，门就开了。
Bruce had scarcely shaken our hands when the phone rang.
布鲁斯刚和我们握了握手，电话就响了。
I had barely started speaking when he interrupted me.
我刚刚开始讲话，他便打断了我。
The Boeing 767 had barely taxied to a halt before its doors were flung open.
这架波音767刚刚停住，它的舱门就弹开了。