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If I ______ plan to do anything I wanted to do ,I'd like to

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/17 22:19:39
If I ______ plan to do anything I wanted to do ,I'd like to go to Tibet and travel through as much of it as possible.
根据我高二英语课本选修6的虚拟语气语法,if虚拟从句表示与过去相反时,虚拟从句须用过去完成时,即had done.
所以我认为这句应该改为:
If I had planed to do anything I wanted to do ,I'd like to go to Tibet and travel through as much of it as possible.
可是答案是横线处填could.
意思是解释的通.表示“能够”.can 用过去式could.
可是语法与课本所说不同啊
为什么?
主句是I'd like to go to..是sb.would do结构,和现在相反,那么从句也应该和现在相反,
你用if i had planned就是和过去相反了,
而用could则正好是can 的过去时,If sb.did...sb.would do...