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形式主语句型结构真正的主语
内容如下:
1、不定式作逻辑主语。
2、从句作逻辑主语。
3、动名词短语作逻辑主语。
4、作形式主语的代词只能用it ,不能用that,this等词。
5、it是形式主语,真正的主语是V-ing形式。
可以把它归类到逻辑主语的第一种(不定式的逻辑主语) 用作宾语的不定式,用作目的状语,用作结果状语的不定式都是属于不定式的大概念里面的。
作形式主语的常见句型:
(1)It is+adj.+主语从句(用于此句型的形容词有:easy,hard,difficultpossible,important,impossible,neceseerybad。interesting,surprising等)。
(2)It is+n.十主语从句(用于此句型中的词汇有:apity,ashame,nowonderone'sduty,fun,goodmanners,badmanners等)。
(3)It is+及物动词的过去分词+that从句(此句型中常见的及物动词的过去分词有:said,told,known,reported,thought,believed,considered等)。
(4)It十不及物动词+主语从句(此句型中常见的不及物动词有:seem,appear,the happen等)。
初中it作形式主语常见句型
it作形式主语常见句式
动词不定式,动名词或主语从句作主语时,通常把它们放在谓语动词前,而用it作形式主语,放到句首,常见句型有:
1. It + be + 形容词+主语从句,如:
It is uncertain whether he can come to Jenny’s birthday party or not.
2. It + be + 名词词组 + 主语从句,这类名词有:a fact, a pity, a shame, an honour,a question等,如:
It’s a pity that you missed the exciting football match. It remains a question whether he will come or not.
3. It + be + 过去分词 + 主语从句,这类过去分词有:announced, believed, expected, hoped, decided, reported, said, shown等, 如:
It is reported that 16 people were killed in the earthquake. It is not decided who will give the operation to the patient. 4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有:appear, happen, seem等, 如: It seemed that he didn’t tell the truth. It happened that I was out when he called. 5. It + be + 形容词 + for sb.)+ 动词不定式
这类句型常用形容词easy, difficult, hard, important, possible,wise等作表语,有时候为了强调不定式动作的执行者,常在不定式前加for sb,如:
It’s necessary for the young to master two foreign language. It is unwise to give the children whatever they want.
这类形容词有:easy, difficult, hard, important, possible,wise 6. It + be + 形容词 + of sb. + 动词不定式,这类形容词常是表示心理品质,性格特征的形容词,如:kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。某人和这些形容词可以构成主系表结构。如:
It’s very kind of you to help me with the work. =You are kind to help me.
It seemed selfish of him not to share his dictionary with others. =He seemed selfish not to share his dictionary with others. 7. It + be +名词词组 + 动词不定式,如: It is not a good habit to stay up too late.
8. It + be + 名词或形容词 + 动名词,这类名词和形容词常常是:good, no good, no use, a waste of, useless, senseless等,如:
It’s a waste of time talking to her any more. It is no use arguing about the matter with him.
9. It + take ( sb. )+ 时间(金钱)+ 动词不定式,如:
It took the workers almost three years to finish building the dam.
It will take a whole day to get to the top of the mountain on foot.
动名词作主语常用句型例句
动名词做主语,谓语动词用单数。例如,Eating
vegetables
and
fruit
is
good
for
our
health.吃蔬菜水果对我们的健康有好处
追问:句型结构?不止一个
追答:好的
追答:1.
动名词结构置于句首
2.
动名词结构后置,it
做形式主语
3.
动名词结构用于
there
be
句型中
追答:例句马上打给你
追答:1.
Talking
is
easier
than
doing
2.
It
is
a
waste
of
time
playing
computer
games
3
There
is
no
point
having
wishes
if
you
don't
at
least
try
to
do
them
动词不定式做主语和动名词做主语的区别可以互换吗
不定式和动名词作主语的区别:
(1) 动名词作主语通常表示抽象动作;而不定式作主语表示具体动作。
Smoking is prohibited here.这里禁止抽烟。(抽象)
It is not very good for you to smoke so much.你抽这么多烟对你身体很不好。(具体)
(2) 动名词作主语时,通常用以表示一件已知的事或经验。不定式短语通常用来表示一件未完成的事或目的。
Climbing mountains is interesting.爬山很有趣。(经验)
Driving a car during the rush hour is tiring.在高峰时刻开车令人厌烦。(经验)
To finish the task will take a long time. 要完成这项任务将要花费很长时间。(具体)
(3) 不定式做主语,一般用it当形式主语,把作主语的不定式短语后置。
It took me only five minutes to finish the job.
扩展资料
在外语学习的课程中,动词不定式的一般现在时被称作“词典用词”,因为它一般被用作词典中该动词的词头。
动词不定式可以作以上各种成分,但它毕竟是动词,所以有动词的属性。
动词不定式及其短语还可以有自己的宾语、状语,虽然动词不定式在语法上没有表面上的直接主语,但它表达的意义是动作,这一动作一定由使动者(动词的使用者)发出。这一使动者(动词的使用者)我们称之为逻辑主语。
注意:
(1) 其他系动词如,look,appear等也可用于此句型
(2) 不定式作为句子成分时,动词用单数形式。
(3) 当不定式作主语的句子中又有一个不定式作表语时,不能用It is… to…的句型。
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