wish虚拟语气的问题

A .had learned
How I wish 是主句,意指:我多么希望.
that I had learned law when I was at college.是从句,表示与过去事实相反的事情
had learned 表示虚拟语气
再问： I wish that I ____ with you last night. A.went B.have gone C.could go D.could have gone 答案选的D 这两题区别在哪？
再答： 上句是wish引导的宾语从句中又出现了 状语从句. I had learned law when I was at college 下句中则表示我真希望昨晚我能跟你一道去. i wish that i had gone with you last night.表示,我真希望昨晚我跟你去就好了.
再问： 是不是在wish引导的从句中 出现了过去时间，选择had done 和 could have done 都可以。
再答： 可以