back and forth前后，bed and breakfast食宿
cap and gown(coat)衣帽，fire and water水火
flesh and blood骨肉，heat and cold冷热
heavy and light轻重，iron and steel钢铁
land and water水陆，love and money金钱与爱情
might and main主力，night and day白昼
north and south南北，off and on开关
old and grey苍老，old and new新旧
one and only唯一，pen and paper纸和笔
rain or shine阴晴，rich and poor,穷富
right and left左右，sword and shield剑与盾
twos and threes三三两两，you and I你我
young and old老少，pin and needle针毯
part and parcel重要部分，give and take合作与让步
mock and satire 讽刺嘲笑，rain and wind 风雨
