用法一：两个单数名词用and连接,表示两个不同的概念时,谓语动词用复数。如:

Steam and ice are different forms of water.

蒸汽和冰是水的不同形态。

用法二：两个单数名词用and连接,表示同一人、同一物或同一个概念,或表示不可分的整体时,谓语动词仍用单数。如：

Trial and error is the source of our knowledge

反复尝试是我们(获得)知识的源泉。

用法三：被 every,each, many a,no等限定的单个主语由and连接时,谓语动词仍用单数。如:

Each boy and each girl has an le.

每个男生和每个姑娘都有一个苹果。

Many a teacher and many a student has seen the film.

许多老师和学生都看过这部电影。

用法四：一个单数名词或不可数名词被几个用and连接的并列形容词修饰时,能指一件事或几件事,这种名词作主语,要根据意义一致的原则决定谓语动词的单复数形式。如:

English and American literature are ealing to her.

英国文学和美国文学都对她有吸引力。

用法五：由and连接的两个what从句作主语时,要根据意义一致原则决定谓语动词的单复数形式。如:

What he says and does do not agree.

他言行不一致。

What he says and does does not concern me

他的言行与我无关。

用法六：由or,nor, either.or, neither..nor, not only….but(also)连接的并列主语,一般根据就近原则,谓语动词的单复数形式要和与它邻近的主语的单复数一致。如：

One or two friends are coming this evening.

今天夜晚有一两个朋友要来。

Either you or I am going to be in charge of this matter.

不是你就是我将负责这件事。

用法七：单数名词作主语,后跟with, along with, together with,as well as, rather than, as much as,but, except等加其他名词时,谓语动词仍用单数形式。如:

Dr Smith, together with his wife, is to arrive on the evening flight.

史密斯博士及其夫人将乘夜班飞机抵达

Nobody but one teacher and three students was in the laboratory

只有一个老师和三个学生在实验室里。