When he arrives hell tell us all about the match. 等他到了,他会好好给我们讲讲那场比赛的情况。
When she had finished she waited as though for a reply. 她讲完之后等了等,仿佛是在等候回答似的。
六、根据是否具有趁机意味来区分
1. 若从句所表示的当的时候具有趁机的意味,则通常用while。如:
Strike while the iron is hot. 趁热打铁。
I tried to slip the note to him while the teacher wasnt looking. 我想趁老师不注意时把条子偷偷递给他。
有时也用when。如:
He stole the money when no one was by. 他趁旁边无人时把钱偷走了。
The boy looks at her repeatedly when shes not looking. 那男孩趁她没看他的时候不断地盯着她看。
七、根据是否用作并列连词来区分
when可用作并列连词,表示这时while也可以用作并列连词,表示而却但as则没有类似用法。如:
I was just about to go to bed when I heard a knock on the door. 我正要睡觉,听见有人敲门。
One person may like to spend his vacation at the seashore, while another may prefer the mountains. 一个人会喜欢在海滨度假,而另一个人会喜欢在山里度假。
八、根据所引出的省略句来区分
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