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作为连词，while常表示“当……的时候“或”在……之时”。但除此之外，它还有其它几种用法。现将while的用法分述如下：１．while在意义上相当于从属连词“when”，即“duringthetimethat”while从句中的谓语动词常表示一个延续的动作或状态。从句译为“当……的时候”。例如
As a conjunction, while often means “when ...” or “at the time of ...”. But in addition, it has several other uses. The usage of while is described as follows: 1. While is equivalent to the dependent conjunction “when” in the sense that the predicate verb in the while clause is often a continuation of action or state. The clause is translated as “When...”. E.g