一般是按复数处理。但当两个名词表示同一事物、同一概念或一个完整的东西时(其特征是 and 后的名词前无任何冠词),谓语动词应用单数形式。如:
Oil and water don't mix .油和水不相溶。(是两个东西)
Butter and bread is healthy food. 涂黄油的面包是健康食品。(是一个东西)
The butter and the bread have been sold out. 黄油和面包都售完了。(是两个东西)
Truth and honesty is the best policy. 真诚是上策。(是一个整体)
The butter and bread has gone bad. 这个涂黄油的面包已经变质了。(是一个东西)
当复数,这里算是两类事物
nd woman,the old and the young, should attend the meeting.