it is hard to understand this kind of Books 去掉形式主语后,下列哪一种是对的?改形式主语有什么要求
Books of this kind is hard to understand
To understand this kind of Books is hard
人气：245 ℃ 时间：2020-05-25 10:27:50
解答
第二个正确.To understand this kind of books is hard.
原句it is hard,做什么hard?“理解这类书 ”is hard
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