主谓一致的英语句子

主谓一致是指：
1） 语法形式上要一致，即单复数形式与谓语要一致。
2） 意义上要一致，即主语意义上的单复数要与谓语的单复数形式一致。
3） 就近原则，即谓语动词的单复形式取决于最靠近它的词语，
一般来说，不可数名词用动词单数，可数名词复数用动词复数。
There is much water in the thermos.
There is not a pen, a knife and several books on the desk
但当不可数名词前有表示数量的复数名词时，谓语动词用复数形式。
e.g. Ten thousand tons of coal were produced last year.
Large quantities of water are needed.
In western countries, mountains of rubbish are thrown away each day.
1 并列结构作主语时谓语用复数
Reading and writing are very important.
注意： 当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and 此时连接的两个词前只有一个冠词。
The iron and steel industry is very important to our life.
2 主谓一致中的就近原则
1) 当there be 句型的主语是一系列事物时，谓语应与最邻近的主语保持一致。
There is a pen, a knife and several books on the desk..
There are twenty boy-students and twenty-three girl-students in the class.
2）当either… or… 与neither… nor， 连接两个主语时，谓语动词与最邻近的主语保持一致。 如果句子是由here, there引导，而主语又不止一个时，谓语通常也和最邻近的主语一致。 Either you or she is to go.
Here is a pen, a few envelopes and some paper for you.
3 谓语动词与前面的主语一致
当主语后面跟有with, together with, like, except, but, no less than, as well as 等词引起的短语时，谓语动词与前面的主语一致。
The teacher together with some students is visiting the factory.
He as well as I wants to go boating.

就是主谓语人称一致，即同为第一第二或者主语为第三人称时谓语动词用单数。例如第一人称：I agree with you第三人称：He does not know that at all

上百度百科输主谓一致，很详细的！