关于UnlessUnless表示if not.在新概念三第一课里有一句...,and experts confirmed

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/10/07 02:24:48

关于Unless
Unless表示if not.在新概念三第一课里有一句...,and experts confirmed that a puma will not attack a human being unless it is cornered.原句不是有个not了吗?把原句改成if not的形式怎么改呢?有这个疑问是因为看到一个选择题：
A:May I have the loan?
B:( )you offer good security.
A.But B.Unless C.Provided(if,正式) D.But for(要不是,虚拟)这里选C,因为B的话,对话就变成如果你不提供好的信用,你不可以贷款.
可能没说得很明白.呵呵

给你下文吧：
UNLESS :
Not unless you offer good security.
PROVIDED:
（意味着 Yes,of course）Provided you offer good security.
注意：如果你要用 unless 前面非有 not 不可,明白吗?
More context for you,hope it helps:
Can I lend/use your computer?
A:Provided you don't damage it.
B:Not unless you promise/swear you won't damage it.

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