as long as 与only if 的用法区别-

问题描述:

as long as 与only if 的用法区别
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as long as 与only if的用法区别 一、基本用法的差别1.as long as 有两个意思,一是用于本义,意为“与……一样长(久)”,在否定句中,也可说成 (not) so long as;二是用于引申义,表示“只要”,用于此义时也可说成 so l...