might-have-beens

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈmight-have-ˌbeens noun [plural]  REGRET/FEEL SORRYthings that you wish had happened in the past but which never did 未遂的心愿，本可能发生的事

Examples from the Corpus

might-have-beens• Byways of history, particularly might-have-beens, also suit the form well.• We like to think about the might-have-beens.• Looking at the might-have-beens of stylistic variation is a way of making the elusive quality of good writing open to inspection.• It takes some imagination to share the contradictions, the unrealised hopes, the might-have-beens, of the past.• This book is not concerned, however, with might-have-beens but with the facts as they were, so far as can be told.

ˈmight-have-ˌbeens nounChineseSyllable  

which Corpus things had that in the you past wish but happened

might-have-beens
ˈmight-have-ˌbeens noun [plural]
things that you wish had happened in the past but which never did