状语从句主要用来修饰主句或主句的谓语。 一般可分为九大类,分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。...
(B) 1 The meeting didnt start___ everyone was there. A. because B. until C. why D. if (D) 2 The boy ___ to bed ___ his mother came in. A. went not; until B. didnt go; after C. went; until D. didnt go; until (D) 3 He ___ back until the work...
连词主要有:when as while before after until as soon as since等 (1)区别when, as, while的用法 ①.when当......时候引导的时间状语从句,其动词既可以是延续性动作的动词,也可以是瞬间性动作的动...