语法一致指的是主语和谓语在语法形式上保持一致。主语为单数，谓语用单数；主语为复数，谓语也用复数。

　eg. I often help him and he often_________(help)me, too.

2.意义一致原则

意义一致是指主语和谓语根据意思上的单、复数确定其一致关系。主语意义为复数，谓语用复数；主语意义为单数，谓语也用单数。

eg. 1) Physics _________(is/are) is my favourite subject.

2) The crowd __________(were/was)surrounding the government official.

3.就近一致原则

就近一致原则是指当主语有两个或两个以上时，谓语动词根据靠近它的主语确定其人称和数的形式。

eg. Either you or he_______(are/is)wrong.

Task3. Fill in the notes and do the related exercises (参阅语法P88-89).

1. and 连接两个名词作主语

谓语动词一般用_________.

Water and air______(are/ is) important to human being.

特殊情况：

1)当and不表示并列意义，连接两个在意义上表示________________________

___________________________时，谓语动词用__________。

The cart and horse(马车) ________(is/are)coming.

War and peace ________(is/are) a constant theme in history.

2)and连接的两个并列名词，有no, each ______ _______和more than one 等修饰时，谓语动词一般用____________.

More than one student __________(were/was) late in the morning.

Each boy and (each) girl _______(is/are) cleaning the classroom now.

2. 集体名词作主语

如果强调整体，谓语动词用单数形式；如果强调个体，谓语动词用复数形式。常见的集体名词有team, group _______ _______ ______ ______等。

eg. Our class is better than any other class at playing football in our school. (强调整体)