assume位于句子开头,引导that从句时,用什么形式

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• 以here,There开头的句子谓语动词用什么形式是用现在进行时态还是 一般现在时
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• 可以用介词+where引导定语从句吗?The cemetery and memorial are situated on the cliff overlooking the beach and the English Channel,from where the boats attempted their landings.（高中外研版教材选修6 Module6）英语中,引导定语从句时,介词+which结构可以用where替换,为什么这个句子中,用from where 引导定语从句吗?但是这句话当中定语从句的先行词是表地点的介词短语吗?我的理解是,该从句先行词是the beach and the English Channel,所以还是不太理解,
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• assume位于句子开头,引导that从句时,用什么形式
• any的用法1any作一些的和任何的讲,分别放在肯定句还是疑问句否定句中?2有书上说‘以any开头的句子,谓语动词不用not否定”,那么应用什么否定?另外这里的any是代词还是形容词性的?请问any作任何讲没有定语从句时可以用not以外的否定词否定吗
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