1、由and连接两个并列主语 其后的谓语动词一般用复数形式。但如果两个单数名词指同一个人、同一事物、单一概念时,谓语动词要用单数,如:a knife and fork ;a cart and horse;the bread and butter;the needle and thread;a cup and saucer;my house and home;cause and...