是When the man being killed is the key to this case还是When the man was killed is the key..1.When the man being killed is the key to this case.2.When the man was killed is the key to this case.有什麼分别?文法有错吗?

是When the man being killed is the key to this case还是When the man was killed is the key..1.When the man being killed is the key to this case.2.When the man was killed is the key to this case.有什麼分别?文法有错吗?
是When the man being killed is the key to this case还是When the man was killed is the key..
1.When the man being killed is the key to this case.
2.When the man was killed is the key to this case.
有什麼分别?文法有错吗?

是When the man being killed is the key to this case还是When the man was killed is the key..1.When the man being killed is the key to this case.2.When the man was killed is the key to this case.有什麼分别?文法有错吗?
第一个错 第一个从句中就没有主语 分词结构也不能做主语 且人不能被持续的杀.
第二个对 When the man was killed是主语 且从句中结构完整 且杀死是个瞬间动作 所以用表时间点的过去式.

人不能一直保持着被杀死。。。所以第二个对。

kill是瞬时动作，所以第二个对。