You need not turn over the book of the bookrest originally
同意云淡风情 you needn't have referred to the books on the shelves you needn't have looked up the books on the shelves
这里考情态动词的用法： didn't need to do表示： 过去不必做某事, 事实上也没做。. needn't have done表示： 过去不必做某事, 但事实上做了。 所以这里应该用第2个。 You needn't have skimmed through the books on the shelves.
you need not to read the book which on the shelf.
You wouldn't have to skim over the books on the bookshelf.
you needn't read the book at the bookshelf at all.
You do not need to go read the books on the shelves。
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