2、when 和while 的用法 (1)I fell and hurt myself while I ___tennis. A. was playing B. am playing C. play D. played (答案:A.连接词when 表示时间上的点,其所引导的句子用过去时,while 表示持续的一段时间,其所引导的句子用过去进行时。) (2)When you ___ this ...
谓语动词多为进行时,或状态动词的一般时。while的这些用法可用when代替,等于“at the time that",“during the time that” 如:Please keep quiet while(when)others are studying. ⑵ ...
在由when, if, after, before, as, as soon as, the minute, the next time, in case, though, till, until, unless, so long as, where, whatever, whenever等引导的状语从句中,常用一...
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