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If I_____that erlier,I wouldn't have made that mistake.

来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/20 00:54:23
If I_____that erlier,I wouldn't have made that mistake.
A.know B.had known C.have known D.knew
B
再问: 可不可以解释一下为什么呢
再答: 这句话是条件状语从句,表假设,意思是说如果早点知道,我就不会犯那个错误了。后半句是说“已经犯错误了”是过去时,所以用假设的话应该是“过去的过去”,即过去完成时。