英语里when表示一.就意思when 的词组,比如hardly...when.had...when(

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1.be doing sth.when
e.g.We were having a meeting when someone broke in.
2.be about to do sth.when
e.g.We were about to set off on our way whenit suddenly began to rain.
3.be on the point of doing when
e.g.She was on the point of going to shop when the telephong rang.
4.had done sth.when
e.g.He had just finished his home work when someone asked him to play basketball.
5.hardly...when(若hardly放句首要倒装,且倒装为主倒从不倒.因为hardly为表否定意义的副词,该类型的词,放句首要倒装）
e.g.Hardly had I arrived when the train left.
(亲,我打这些字可累了,又换中英文,又改大小写的）
======以下答案可供参考======
供参考答案1:
1，no sooner .....than...
例句：I had no sooner e into the house than the rell rang.
我一进门电话就响了
2，hardly.....when...
I had hardly finished the homework when my teacher checked it.
我刚一完成作业老师就来检查了。