If I______they were on sale online, I wouldn’t have bought the traveling bags in

游客2024-06-22  19

问题 If I______they were on sale online, I wouldn’t have bought the traveling bags in this store.

选项 A、know
B、knew
C、had known
D、have known

答案 C

解析 本题考查if虚拟语气的用法。if虚拟语气的构成规则如下:表示与过去事实相反,形式为“If+主语+had done,主语+should/would/could+have done”;表示与现在事实相反的情况,形式为“If+主语+did,主语+should/would/could+do”;表示与将来相反或不大可能实现的事实,形式为“If+主语+did/were to do/should do,主语+should/would/could+do”。本题表示与过去事实相反,主句使用了would have done形式,故从句应使用过去完成时,因此C)为本题的答案。
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