before

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before篇(一):before属于什么时态要全部说出来

可用于一般现在时,一般过去时,现在进行时,过去进行时,现在完成时或过去完成时等,如I have never been there before.He had worked for ten years before he joined the army .He sits before me .He stood before me yesterday .He is standing before me now.

before篇(二):Before和after各是什么意思啊?

befor是在……之前after是在……之后

before篇(三):before用法.用before翻译,在上网之前,我们被要求先注册.

We are asked to register before surfing the internet.除了用ask表示被要求外,还可以用request.We are asked to register before surfing the internet.也可以用getting on代替surfing.before引导的状语短语最好放在句尾.before后面家名词或者动名词.

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