Ahh, thank you. Is there any difference between 'yameru hou ga ii' and 'yameta hou ga ii', or is plain past tense just the more common of the two? In that case, to make a statement past tense, would you do this?
お前は晩餐に行った方がいい。You ought to go to dinner.
お前は晩餐に行った方がよかった。You ought to have gone to dinner.