Student or Learner
How can i utter the sentence if hav to show any wishes in my past?
Hi and welcome to Using English.
I wish I had [done something].
I wish I had visited my grandmother more before she died.
I wish I had taken piano lessons when my parents offered.
I wish I hadn't taken statistics -- it was useless and brought my grade point average down.
Is that what you mean?
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.