1. I wish I had known then what I know now.
2. I wish I knew then what I know now.
3. I wished you had lived with me back then.
4. I wished you lived with me back then.
5. I wish you told me.
6. I wish I went with them.
If I am not mistaken, "knew" is interchangeable because it can mean knowing in the past and present, so had known and knew is interchangeable.
So I cannot say "I wish you lived with me back then." It should be had lived because it is a completed action. Same goes for my first two exampes in #1. It should be had told and had gone.
I am sorry if I have asked on another forum but I still don't fully understand. https://forum.wordreference.com/threads/wish-you-told-me.3368644/
"I wish I had known" is correct here. The time of reference is past, in conjunction with another past action—Rohan getting selected to the final event of the contest. A: How did Rohan get selected to the finals of the spell bee contest?
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"I wish I had known" is correct here. The time of reference is past, in conjunction with another past action—Rohan getting selected to the final event of the contest.
A: How did Rohan get selected to the finals of the spell bee contest? Weren't both your scores the same?
B: Yes, but that was in the penultimate round in the preliminary event. In the last round I could get onl