主谓一致
1 并列结构作主语时当意义为复数时谓语用复数
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.
The League secretary and monitor was asked to make a speech at the meeting.
The singer and dancer is my neighbor.
2 主谓一致中的靠近原则
there be 句型 not only…but also…, either…or…, neither…nor 就近原则
There is a pen, a knife and several books on the desk..
Not only John but also I am going to Shanghai next week.
Either you or she is to go.
3 谓语动词与前面的主语一致
with, together with, as well as, but, except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.
4 谓语需用单数
1)代词each, every, some, no, any等构成的不定代词作主语，谓语用单数.
Each of us has a tape-recorder.
There is something wrong with my watch.
2) and连接的两个单数名词前若用each,every,no修饰,谓语动词用单数形式.
No book and no pen is found in the schoolbag.书包里没有书和钢笔.
Every boy and every girl is asked to answer the same question.
3) 当主语是一本书或一条格言时,谓语动词常用单数.
The Arabian Night is a book known to lovers of English.
< The Arabian Night >是英语爱好者熟悉的一本好书.
4) 表示金钱,时间.距离.价格或度量衡的名词作主语,常看作一个整体,谓语一般用单数.
Three weeks was allowed for making the necessary preparations.
Ten yuan is enough.
5) "more than one +名词"用单数.例如:
More than one teacher gets the flowers. 不止一个教师得到了花.
6) "many a +名词"用单数.例如:
Many a student has been sent to plant trees. 很多学生被派去植树.
7)动词不定式,动词-ing形式短语作主语时,谓语动词常用单数.例如:
Going out for a walk after supper is a good habit.晚饭后出去散步是一个好习惯.
8) 以-ics结尾的学科名词,如politics,physics,mathematics谓语用单数. 以-s结尾的名词news, works, plastics等同属此类.谓语用单数
Politics is now taught in all schools. 现在各学校都开设政治课.
5 谓语需用复数
a number of, a variety of, a group of, masses of, quantities of短语后谓语动词多用复数
A number of students are from the south.
6 谓语动词单复数情况不定
1) what, which, who, none of, some of, more, most of, all of等词的单复数由其指代的词单复数决定. All is right. (一切顺利.) All are present. (所有人都到齐了.)
*一般all指人时,动词用复数; all指物时,动词用单数.例如:
"All are present and all is going well." 所有人全部到场了,一切进展顺利
2) 集体名词作主语时,谓语的数要根据主语的意思来决定.如family, audience, crew, crowd, class, company, committee等词 用复数表示集体中的各个成员, 单数表示该个集体.
His family isn't very large. 他家不是一个大家庭.
His family are music lovers. 他的家人都是音乐爱好者.
people, police, cattle, poultry(家禽).militia(民兵).vermin（害虫）等在任何情况下都用复数形式. Are there any police around
3) 与后接名词或代词保持一致
"half of, the rest of, part of, most of, a portion of, all of，百分数，分数，of the following等后接名词"作主语时,谓语动词形式根据of后的名词而定.
Three fourths of the surface of the earth is covered with water.地球表面四分之三为水所覆盖.
The following are good examples下面是一些好例子
4) trousers, glasses, shoes，scissors（剪刀），等作主语时,前面若有"一条","一副","一把"之类的单位词,动词用单数; 若没有单位词或单位词是复数,则谓语动词用复数.
arms（武器）.clothes谓语动词常用复数
The shoes are all right. 这些鞋子都很合适.
One or two persons are sent there to help them do the work.派一两个人到那儿去给他们帮忙.
6）"one of+复数名词+ 定语从句"结构中,定语从句的谓语动词要用复数;
"the only one of +复数名词+定语从句"的结构中,定语从句的谓语动词要用单数.
He is one of the students who get there on time.他是准时到达那里的学生之一.
He is the only one of the students who gets there on time.他是唯一一个准时到达那里的学生之一.
