i think______(一定是)Jack that parked the car like that,for he is always doing so.为什么标答是it must have been
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![i think______(一定是)Jack that parked the car like that,for he is always doing so.为什么标答是it must have been](/uploads/image/z/7893411-51-1.jpg?t=i+think______%28%E4%B8%80%E5%AE%9A%E6%98%AF%EF%BC%89Jack+that+parked+the+car+like+that%2Cfor+he+is+always+doing+so.%E4%B8%BA%E4%BB%80%E4%B9%88%E6%A0%87%E7%AD%94%E6%98%AFit+must+have+been)
i think______(一定是)Jack that parked the car like that,for he is always doing so.为什么标答是it must have been
i think______(一定是)Jack that parked the car like that,for he is always doing so.
为什么标答是it must have been
i think______(一定是)Jack that parked the car like that,for he is always doing so.为什么标答是it must have been
it 是形式主语,代后面的从句,原来形式是it must be,用了完成时
I think it must Jack that parked the car like that, for he is always doing so.
对过去事实的推测。。。那为什么是完成时 而不是it must bemust (只用于肯定句)根据具体事实所做的很有把握的主观肯定判断和猜测:
“一定----,肯定---”:
--- You have worked hard all day, you must be tired. (对现在事实的判断)
--- It’s dark. Mother must b...
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对过去事实的推测。。。
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MUST表肯定一定,而jack停车是过去并且已经完成,所以答案是it must have been
must have done表对过去的肯定猜测
注意should have done是本应该做了什么
详见高二情态动词语法