在初二阶段我们学到了下面几组同义词,但它们在用法上有区别,下面我们来学习这几组词。(1)when,while和aswhen“在…时刻或时期”可兼指“时间点”与“时间段”,从句动词既可以是终止的,也可以是持续的。as“边…边”或“与…同时”,重在表示动作同时,伴随进行。while只指“时? In the second stage we learned the following groups of synonyms, but they differ in usage. Let’s learn about these groups of words. (1) When, while, and as “when ... or time” can refer to both “time” and “period of time”. The verb of a clause can be either terminated or continuous. As “edge ... edge” or “simultaneously with ...”, the emphasis is on the simultaneous movement of the action. While only refers to "time?