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谓语动词降级篇一
谓语动词指在句子中充当谓语的动词，有行为动词，系动词，情态动词和助动词等几种，其中行为动词又包括及物动词和不及物动词。 谓语动词是与非谓语动词相对应的概念.两者都是动词，但是前者是作谓语成分，后者不能作谓语成分.而谓语成分就是用来说明主语的动作或状态的，一般由动词或短语动词承担.
①、主谓分割原则
例1：to the citizens of the united states, the bald eagle,
a
america's national bird, symbolize strength and freedom.
bcd
分析：c错，应改为symbolizes。主语谓语用逗号分割开，主语the bald eagle为单数，谓语动词也应该用单数形式。
②、与后者一致原则
not…but, 强调but后面的名词，
not only…but also
③、与前者一致原则
名词+with/together with/as well as/including+复数名词，谓语用is,
中心词在前面，谓语动词应该与前面的名词保持一致
例：the athlete, together with his coach and
abc
several relatives, are traveling to the olympic games.
d
分析：d错，与谓语动词与the athlete 保持一致，改为is
④、就近原则
or, either…or, neither…nor,
单数名词+or+复数名词+are
如果把句子变为一般疑问句，也就是把be动词提到前面，那么变为is
所以注意一点： 如果是陈述句，靠后面近，用复数
如果是疑问句，靠前面近，用单数
例：the structure or behavior of many protozoans are
ab
amazingly complex for single-celled animals.
c d
分析：a错，应改为and。从谓语动词是复数形式判断，主语应该为复数，or连接两个名词时动词和后面的名词保持一致，behavior是用单数形式，因此只有改为并列连词and才能使主谓在数上保持一致。
⑤定语从句主语就近原则
there are five apples that are red.
apples是复数，因此从句谓语动词是复数。
例：a rocket burns propellant rapidly and most rockets
a
carry a supply that last just a few seconds.
b c d
分析：d错，应改为lasts。从句的逻辑主语a supply为单数，其谓语动词应为单数形式。
⑥the +形容词主谓一致
the rich are not always happier than the poor.
the rich 表示一类人，应该用复数
⑦、倒装句的主谓一致
改错题倒装句的主谓一致一般考两种情况：
a. there be 句型
there be+名词+名词，那么最近的`名词决定其形式
b. between/ among 放在句首+be+名词，名词其实是主语，所以be和名词保持一致
例：there are no known society in which left-handed people predominate.
a bcd
分析：there be 句型由最近的名词决定其形式，society当然用单数，a错，there are 改为there is
例：between the foothills of the andes and the pacific
a b
ocean are a dry coastal strip averaging about 30
c
miles in width.
d
分析：倒装句，are改为is
例：among the favorite attractions at the national air and
ab c
space museum in washington d.c. are the film
d
presented on the five-story-tall screen.
分析：d错，应改为films , 主语实际上是名词，应该与谓语动词保持一致。
⑧、百分比结构的主谓一致
fifty percent of + 名词
one percent of + 名词
谓语动词的形式和百分比多少没有关系，主要取决于后面的名词，比如：
one percent of my students + are
fifty percent of my time is spent on working.
这里要强调两个结构
half of =fifty percent
most of + 可数名词 + are
most of + 不可数名词+ is
例：nearly half of the ancient meteor craters has been
a b c
found in central and eastern canada.
d
分析：c错，应改为have been。介词of的宾语为复数名词短语，作主语的中心词half当然表复数，相应的谓语动词应为复数形式。
例：approximately fifty percent of the package utilized
a b
in the united states are for foods and beverages.
c d
分析：a错，应改为packages。从谓语动词用复数形式判断出主语是复数名词。注意food用复数表示不同种类的食品，beverage用复数表示不同种类的饮料，故(c)、(d)均没有错
①、主要考察时间状语
例 the metal aluminum has been first isolated early in the nineteenth century.
a bc d
分析：metal, aluminum同位语，in the nineteenth century为明显表示过去时间的状语, 因此应该用过去时态，把has been改为was