1) Twenty miles is a long way to walk.

2) Three pints isn't enough to get me drunk.

(6)国家、单位和书报的名称，作为一个单一的概念，其谓语动词要用单数形式。例如：

1）War and Peace is the longest book I've read.

2）General Motors has recently closed down a plant. (通用汽车公司最近关闭了一家工厂。)

3.毗邻一致（就近原则）

(1)由连词or, neither...or, either...or, not only ... also, nor等连接的并列主语，谓语动词的单复数形式按毗邻一致的原则，与贴近它的主语一致。例如：

1) He or you have taken my pen.

2) Either you or he is no telling the truth.

3) Not only the switches but also the old wiring has been changed.

(2)在there be 的结构中，谓语动词的单复数形式一般也采取就近原则。例如：

1)There is a desk and four benches in the office.

2)There are two chairs and a desk in the office.

二、代词指代一致

指代一致是指句中的代词应该在人称、数、性等方面与所指的词保持一致。

1.人称一致

(1)当代词指代名词或另一个代词时，须在人称上与所指代的词保持一致。例如：

1）I recognized one of the girls, but I didn't speak to her.

2) That woman said that she was over fifty.

3) They asked whom they should apply to.

(2)当代词指代集合名词时，用单数人称代词强调整体，用复数人称代词强调个人。例如：

1) The committee have discussed their report on the disaster.

2) The audience are raising their hands to signify their approval.