keep是系动词为什么还能用被动语态?

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• keep是系动词,为什么不用主动表被动?
• find 后面加的分词是看什么的比如说 He was found standing over there (我自己造的句子 应该是对的吧)还有一句是我的翻译 Eventaully the children were found hiden in an old house.前一句为什么用find doing 后一句为什么用过去分词 和主语之间都不是主谓关系么?这是系动词的用法么?另外说一下还有什么词是这样的用法 keep stay remain等是不是这样的
• she keeps being sick 为什么用being,keep 是动词还是系动词?
• go off不及物动词,不能用于被动语态；go off还可表示“离去”；turn off表示“熄灭为什么是及物动词不是后面也加介词off了吗怎么还是及物动词 take off什么形式时是及物动词 那go off 为什么是不及物动词
• 为什么句子这里需要使用being句子是：The improvement in his health is being maintained.不是已经有系动词了么,直接用被动语态不就好了吗?The improvement in his health整个做主语.为什么要在这里使用being.
• I am the same age as you ,/ yours 选哪个?I am the same age as you ,/ yoursI am the same weight as you ./ yoursI am the same height as you ./ yours这三个句子 用 you ,还是 yours I have the same pen as yours.这个虽然用个是 yours,但我觉得和 我上面的三个例句,情况不一样.I am the same.as you / yours 这种 主系表结构的句子,后面应该 怎么选择.2 I am the same weight as you ./ yours这里面的动词，为什么不能用 have I am the same weight 不是成了 我是一样的体重了。
• 被动语态填空The food _ (smell) delicious.为什么是smells?明明是系表结构,被动语态只有在动词有状语修饰时用主动表被动,这里是smell+adj,根本不是,为什么不用is smelled?网上说smells,感到很奇怪
• 1.When they got back home from the cinema last night,they found that the house____ into.A.was broken B.had been broken.break是点动词吗?不是的话怎么能持续呢2.---You seem sleepy,Tim.---Oh,I ___ all night preparing for the report and I can hardly keep my eyes open now.A.stayed up B.have been staying up这道题怎么又变成现在完成时了?3.He suffered from serious test anxiety.____,he could neither sleep nor eat well before the important exam.A.In that case B.As a result为什么不能用A?就是这样
• 1.our teacher is coming.Please stop talking and keep (quiet)2.Excuse me is there (anything new) in today's newspaper3.be known as 解释一下为什么不用quietly（告诉下如何区分keep是系动词还是实意动词）和为什么同anything new 而不用new anything
• Water must be kept from running away.这里面keep系动词不是无被动语态会进行时态吗那这个里面为什么还用 be kept
• 已知函数y=x+2分之2x-1,当x=m时,函数值为1,则m的值为（）.
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