on condition that; supposing
I'll be hanged if I ever give you anything.
出自： J. Carlyle
I'm blessed if I know.
出自： F. W. Crofts
If the fish smells clean..chances are it is fresh.
出自： C. Claiborne
I wasn't to worry if I found his tablets in the bathroom.
出自： O. Norton
误 I wonder if she found something.
正 I wonder if she found anything.
析 if引导的从句中,通常用any, anything, anybody, anywhere作从句的宾语,而不用some, something, somebody, somewhere。