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主谓一致中have和is的区别
主谓一致have和are的区别:
好像这两个动词不应该混淆,因为意思都不一样,be动词是表示是的意思,have动词表示的是拥有,属有的意思。
这两个词用作助动词构成谓语也不应混淆。
be+verb的含义是表示被动have + verb构成的是完成时态,表示的是主动的含义。
主谓一致have与has的用法区别
当主语为非第三人称单数,如:i
/
you
/
they/
we
等时用have
如:we
have
a
big
classroom.
i
have
waited
for
you
for
about
two
hours.
但主语为第三人称单数,如:he/
she/
it
等时用has
如:my
sister
has
a
nice
watch.
tom
has
already
finished
doing
his
homework.
主谓一致语法总结
一般来说,其实谓语动词的单数形式的规则是与前面所接主语息息相关的,1.前面主语若是单数,如a cat或a pen 或he (第三人称)或she(第三人称) 或it(第三人称),这里的 谓语动词用单数,即我们平常所说的第三人称单数,缩略就是三单形式,如She likes swimming.如It is delicious.2.前面主语是两个或两个以上名词或是复数概念的名词,如Mike and Jone或He ,she and I 或we (复数)或cats(复数)或you(第二人称)或I(第一人称)后面用复数概念,即谓语动词不用变换形式,用原形,如We have many books.
主谓一致语法讲解
主谓一致主要针对一般现在时态:(人称做主语)
1.Be动词
I am student我 是学生
he/she is student 他/她 是学生
We/you/they are students. 我们/你(们/)他们 是学生
2.助动词
I do/have/
She/he does/has
We
/they/you/ do/have
3.行为动词(以eat为例)
I eat
She/he eats
You/they eat
总结:对于一般现在时态,第一人称和第二人称的谓语动词用复数,第三人称用单数。对于Be动词,复数是are,单数是is,(am只针对I 除外);对于助动词,单数是does/has,复数是do/have;对于行为动词,复数是动词原形,单数是原动词的单数第三人称形式(加s或者es...)
现在完成时
She/he has done
I have done
They/you/we have done
总结:对于现在完成时态,只有助动词have的变化,has/have done共同组成复合谓语。主语是she/he/用has,其他情况用have
对于非人称作主语的句子也有很多,这里就要判断主语是单数还是复数,试比较如下例子:
The girl is outgoing.
The girls are outgoing.
Everyone knows the answer.
All of them know the answer.
Nobody knows the answer.
The book is written by Mrs Green.
The books are written by Mrs Green.
Do I/you/they/we win the prize?
Does he win the prize?
Have you/they/ received the letters?
Has she received the letter?
其他情况的主谓一致:
【There be句型】
There are three boys in the beach.
There is one girl in the beach.
There is one girl and three boys in the beach.
There are three boys and one girl in the beach.
最后两个例子是就近原则,也就是跟be动词挨得近的那个是复数,谓语动词就用复数,反之亦然。
【动名词做主语用单数】
Playing sports is good for your body.
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