1. What a pity! Peter is sick today.
➙ We wish Peter wasn't  sick today.
2. He's sorry he isn't invited to her party.
➙He wishes he was  invited to her party.
3. He keeps coming to class late.
➙We wish he came  to class early
4.It's a pity! This question seems difficult for me.
➙ I wish I could answered This question
5. This is the first time i tried that food.
➙I have never tried that food before 
6.Attending the advanced courses helps Nam improve his skills.
➙ If nam didn't attend the advanced courses , he wouldn't  improve his skills
7."I am going to attend an advanced English course at ILA center next month." An Huy said to me.
➙An Huy told me he was  going to attend an advanced English course at ILA center next month