本文目录
it作形式主语常见句式 有哪些
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.
形式主语it的5种用法是什么
本文中，我为大家整理了形式主语it的5种用法，快来看看吧！
it的5种用法
1、指代性it一般是指人称代词it，it作人称代词时可指代事物、动物、婴儿、未知的人或一件事。
2、不定式作主语，It's my pleasure (to help you).
3、it做先行词。
4、it做形式宾语。
5、引导强调句的it。
it做形式主语基本句型
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
形式主语it的5种用法
一、形式主语it的5种用法是一下
1.指代性it一般是指人称代词it,it作人称代词时可指代事物、动物、婴儿、未知的人或一件事。
2.不定式作主语,It's my pleasure (to help you).
3.it做先行词。
4.it做形式宾语。
5.引导强调句的it。
（1）it做形式主语基本句型：It+be+形容词+主语从句，
（2）It+be+名词词组+主语从句
（3）It+be+过去分词+主语从句
主语从句中it做形式主语的常见句型有哪些
常见句型有：
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.
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，
It + be + 形容词+主语从句
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，
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，
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。
It + be +名词词组 + 动词不定式
It + be + 名词或形容词+ 动名词
It + take ( sb. )+ 时间（金钱）+ 动词不定式
用的比较少的 It + take ( sb. )+ 时间（金钱）+ 动词不定式
举几个例子比如：
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.
以上就是关于主语从句形式主语it范围 ,it作形式主语常见句式 有哪些的全部内容，以及主语从句形式主语it范围 的相关内容,希望能够帮到您。
