文档介绍：一. when: at that time 就在那时(突然)
① be about to do sth when…
(2002年上海) He was about to tell me the secret when someone patted him on the shoulder.
We were about to start when it began to rain.
② be on the point of doing sth when…
I was on the point of going to bed when you rang.
He was on the point of leaving when someone knocked at the door.
一. when: at that time 就在那时(突然)
③ be doing sth when…
(2004年天津)I was leaving when several girls came up to me.
(2004年北京春季)we were swimming in the lake when suddenly the storm started.
I was thinking of this when I heard my name called.
④ be on the way to ..地方.... when…
I was on the way to the canteen when I saw a wallet.
一. when: at that time 就在那时(突然)
⑤sb had just done sth when …
We had just drifted off to sleep when the phone rang.
⑥(模拟考试)He had only been there for a few hours when he heard someone walking toward the door of his office.
一. when: at that time 就在那时(突然)
⑦(2004年广东) I wondered whether I ought to leave, when the telephone rang.
⑧(模拟考试) I almost started to yell his name when I suddenly remembered he was in bed asleep.
⑨(百家讲堂)I started to walk towards the garbage can when I noticed a poor man walking his bike out of the restaurant.
二. when: just after which 刚做完……