1 it is not difficult to find books about animals in our school library 为什么是it

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1itisnotdifficulttofindbooksaboutanimalsinourschoollibrary为什么是it1itisnotdifficulttofindbooksaboutani

1 it is not difficult to find books about animals in our school library 为什么是it
1 it is not difficult to find books about animals in our school library 为什么是it

1 it is not difficult to find books about animals in our school library 为什么是it
It是形式主语,真正主语是to find books about animals in our school library

这应该是个强调句型吧

额.... 这个问题 百度居然也通知我来回答。惭愧