On Shabbat and Yom Tov, usually one person makes ha'motzi and everyone else at the table says amen and eats some bread. As far as I am aware, during the week, nobody ever eats food without making ...
I understand that if I hear another person make a bracha (and perhaps even if I don't actually hear it), I may? must? respond "amen". I also understand that saying "amen" can allow me to be yotzei ...