as long as 与only if 的用法区别
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,
first 与 at first的用法区别
first与at first的用法区别 一、从词性上看区别first可用作形容词或副词,有时还可用作代词; 而at first作为介词短语,只起副词用作用(在句中用作状语)。 如:First class is the most expensie ay to tr
some time sometimes的用法区别
(1) sometime意为“某个时候”,可用于将来或过去来。如:Come to see us sometime. 什么时候来看看我们。I’ll speak to him about it sometime. 我什么时候将和他谈谈这事。e’ll meet a
such as 与 as such的用法
两者词序相反,意义区别也很大,后者有两个主要意思。如: (1) 表示“按照某词通用的词义”“根据某词严格的词义”。如: It’s not an agreement as such, but it ill hae irtuall