since前后分别用什么时态

since前后分别用什么时态

QQ知识库QQ活动网2022-08-06 10:00:038300A+A-

since从句接什么时态,主句接什么时态

since 解释为自..以来。主句用现完,从句用一般过去式,例:she has been living a hard life since her husband died. 或者有一种特殊举行,it is+时间段+since+从句,从句时态还是一般过去 例:it's been ten years since they married。 还有一种解释为由于,既然: he must have taken the book since it isn't here. 他一定是把书拿走了,因为书已不在这里了。 since it is so hot, let's go swimming. 既然天气这么热,我们去游泳吧。

since前后分别用什么时态

英语的since前后都用什么时态

since如果解释为“自从...以来”,引导时间状语从句时,则其前面的主句用现在完成时,其后的从句用一般过去时。如:i‘ve made great progress in english since i came to this school.自从我来到这个学校以来,我在英语上取得了巨大的进步。

since前后分别用什么时态

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