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1）as, when 引导短暂性动作的动词。
4 v" Z* {! z9 K H' ~$ _6 |' N Just as / Just when / When I stopped my car, a man came up to me.0 g/ O1 ^* \) r* \" R7 x
2）当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或 while。
8 W3 i1 y7 Q* e! R& r When you have finished your work, you may have a rest.
v. L7 f7 L$ i/ l3）从句表示"随时间推移"连词能用as，不用when 或while。
; d4 B: ]" i0 `# W5 u As the day went on, the weather got worse.
& O: P" D+ u0 R 日子一天天过去，天气越变越坏。
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发表于 2005-9-30 07:07:33
