1). 3 предложения со словами must и ought.
2). Предложение со словами taste(существительное,глагол) и like(глагол и предлог)
3). Предложение со словом matter в двух его значениях

1). You must behave well. You ought to have known.They ought to have come.
2). The taste is awful. It tastes awful. I like ice-cream. You are not like me.
3). It doesn't matter. This matter is important.