benefit与benefit by/from的区别 1. benefit by [from] 受益于。如： The plants benefited from the rain. 植物得益于这场雨。 We benefit from daily exercises. 我们得益于每天做操。 We benefited greatly by this frank ta...

before long与long before 1. before long 的意断是不久，很快。如： Ill be back before long. 不久我就回来。 Before long he got married. 不久他就结婚了。 2. long before有两个用法： (1) 老早，早就(单独使用...

when, while, as区别详解 一、根据从句动作的持续性来区分 1. 主短从长型：即主句是一个短暂性的动作，而从句是一个持续性动作，此时三者都可用。如： Jim hurt his arm while [when, as] he wa...

unless与if ... not的用法区别 两者都可表示否定的条件，有时可换用。如： Come tomorrow unless I phone [if I dont phone]. 要是我没有打电话，明天就来。 You wont catch the train unless you hurry [if you don...

until与till的用法区别 用作介词或连词，意为直到(为止，两者常可换用，只是 until 比 till 稍正式，所以在正式文体中，一般用 until，而在口语或非正式文体中则两者都可用。从其后所接...

as, when,while的用法区别详解 三者都有当时候的意思，注意以下用法与区别： 1. 若主句表示的是一个短暂性的动作，而从句表示的是一个持续性动作时，三者都可用。如： He fell asleep w...

in the air与on the air 1. in the air 在空中；在流传中；渺茫。如： Birds fly in the air. 鸟在空中飞。 There was thunder in the air. 天上打着雷。 The plan is quite (up) in the air. 计划还相当渺茫。 Look, hol...

remind sb to do与remind sb of doing 先做一道题： Remind me _______ the medicine tomorrow. A. of taking B. taking C. to take D. take 【陷阱】容易误选A。受 remind sb of (doing) sth 这一常用结构的影响。 【分析】最...

according as与according to 1. according as 根据，随而定(后接从句)。如： Everyone contributes according as he is able. 每个人根据自己的能力作出贡献。 You will be praised or blamed according as your work is good o...

lie, laid, lay, lain, lying详析 请先看一道题： When she came several days later, she found that all things still _______ where she had _______ them. A. lay; laid B. laid; laid C. lay; lain D. lying; lain 【陷阱】几个干扰项均...