英语since表时间用法探讨概述

On the Usages of the Word Since Expressing Time

英语since作介词、副词和连词时都可表时间的意义 ,但作表时间从属连词时 ,须从三方面加以认识 ,即 :1 .作为连词时 ,从句谓语分别为瞬间动词和持续动词或状态时的意义。 2 .句型是It +is +aperiodoftime +since -clause时的意义。 3.省略性的主从复合句Since +V -ing +mainclause时的意义。

The word since can express the meaning of time when used as prepositio n, adverb and conjunction.But its exact meaning may be known from three aspects when used as subordinate c onjunction for time, that Is, from the predicate of the dependent clause being momentary or durative verb s and two pattens : It +is +a period of time+since -clause ; Since +V-ing +main clause