表语形容词详解和Itis+形容词+todo句型的使用
Itis+adj+doingsth与Itis+adj+todosth有什么区别
Itis+adj+doingsth与Itis+adj+todosth有什么区别It is+adj+doing sth与It is+adj+to do sth有什么区别It is+adj+to do sth和it+adj+to do sth 的区别：1、 It is important to drink enough water every day.it形式主语，没有意思的。
to drink enough water every day，真正主语。
意思是：每天喝足够的水很重要。
,而谓语is important，使用了形式主语，而把真正主语放在后面，所以句型：It is+adj+to do sth的意思是：做某事怎么样。
2、 Doctors think it is important to drink enough water every day.这时候It is important to drink enough water every day.是宾语从句,作think的宾语.因为think 可以形成think+ 宾语+宾语补足语,所以此句可改成Doctors think it important to drink enough water every day。
也就是少了be动词is，此时，it是形式宾语，important为宾语补足语to drink enough water every day为真正宾语。
拓展资料It is+adj+doing sth1、Germany should understand this because that is precisely what it is doing.德国应理解这点，因为这正是该国正在做的事情。
2、How hard it is doing this.这些事做起来行难。
3、Fortunately, it is doing so.幸运的是，西方正在这么做。
itis句型
It is 句型It is 句型1. It is + 被强调部分+ that ...该句型是强调句型。
将被强调的部分放在前面，其它部分置于that之后。
被强调部分可以是主语，宾语，表语或状语。
强调的主语如果是人，that可以由who换用。
如果把这种句型结构划掉后，应该是一个完整无缺的句子。
这也是判断强调句型与其它从句的方法。
It was about 600 years ago that the first clock with a face and an hour hand was made.It was they that (who ) cleaned the classroom yesterday. It was in the street that I met her father.2. It is not until + 被强调部分+ that ...该句型也是强调句型。
主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是not ... until ... 的强调形式。
It was not until she took off her dark glasses that I realizedshe was a famous film star.= Not until she took off her dark glasses did I realize she was a famous film star.= I didn’t realize she was a famous f ilm star until she took off her dark glasses.3. It is clear ( obvious, true, possible, certain....) that .....该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显然，真的，肯定．．．）＂是主语从句最常见的一种结构。
it is adj for sb to do sth
引用It is +adj+for sb to do sth与It is+adj+of sb to do sth有何区别？2010-10-23 18:04:26| 分类：单词辨析| 标签：sth 主语 sb 形容词表语|字号大中小订阅本文引用自儒风《It is +adj+for sb to do sth与It is+adj+of sb to do sth有何区别？》引用儒风的It is +adj+for sb to do sth与It is+adj+of sb to do sth有何区别？快乐英语的It is +adj+for sb to do sth与It is+adj+of sb to do sth有何区别？It is+adj.+of sb. +to do sth中的adj.跟sb.有关,这个adj.是用来形容sb.的,表示某人这么做真是太adj.了．你会发现在这个句型中你把sb.和adj.提出来可以造个句sb. is(are) adj.如It‘s very kind of you to help me.把里面的sb.和adj.提出来可以发现you are kind是说得通的.而It is +adj.+for sb.+to do sth表示做某事对某人来说很adj.这里的adj.是do sth.的属性里面的sb.跟adj.没有直接联系如It‘s difficult for you to deal with the problem.你就不能说you are difficult了吧这就是怎么决定句子中的介词用of还是用for的方法若形容词是描述不定式行为者的性格、品质的，如kind，good，nice，right，wrong，clever，careless，polite，foolish等，用of sb.。
It’s very kind of you to help me.你能帮我，真好。
It’s clever of you to work out the maths problem.你真聪明，解出了这道数学题。
it is 形容词 doing的句型
it is 形容词 doing的句型在英语语法中，有一种句型叫做“It is 形容词doing”的句型。
这种句型的结构是由It is + 形容词 + doing构成的，其中It是主语，形容词用来描述It正在进行的动作。
这种句型可以用来表达各种不同的情况，比如：1. It is raining outside.（外面正在下雨。
）2. It is getting dark.（天色渐渐变暗。
）3. It is snowing heavily.（下雪很大。
）4. It is getting late.（时间很晚了。
）5. It is getting hot in here.（这里越来越热了。
）这些句子中的形容词都用来描述It正在进行的动作，如下雨、变暗、下雪、时间变晚、变热等。
除了描述天气和时间的变化外，这种句型还可以用来描述人的情感状态，比如：1. It is exciting to watch a live performance.（看现场表演很令人兴奋。
）2. It is frustrating to deal with difficult customers.（与难缠的顾客打交道很令人沮丧。
）3. It is rewarding to help others.（帮助他人是一件有意义的事情。
）4. It is relaxing to listen to music.（听音乐是一种放松的方式。
）5. It is inspiring to read a good book.（读一本好书很有启发性。
）这些句子中的形容词用来描述人的情感状态，如兴奋、沮丧、有意义、放松、有启发性等。
除此之外，这种句型还可以用来描述事物的状态或特征，比如：1. It is important to maintain a healthy lifestyle.（保持健康的生活方式很重要。
）2. It is necessary to have a good education.（接受良好的教育是必要的。
Itis+形容词+offorsb+todosth
Itis+形容词+offorsb+todosthit is+adj+for sb to do... it is+adj+of sb to do ....的含义及区别如果句型中的形容词用来形容人的,就用of,否则就用for.例句：It is necessary for us to drink plenty of water. necessary: 不是用来形容人的形容词.It’s kind of you to help me.kind:用来形容人的形容词.一.导入It is kind of you to help me.你能帮我太好了.（kind 形容的是you）It is beneficial for you to do sports.运动对你有益.（beneficial 形容的是do sports）二.表达含义:1.it is+adj+for sb. 就是“做…对某人(for sb)来说怎么样(adj)”2.it is+adj+of sb. 就是“某人做…(of sb)怎么样(adj)”三.辨析:it is+adj+for sb和it is+adj+of sb.①“It’s +adj.+of+sb.+不定式”表示“某人(做某事)怎么样”一般用表示人物的性格,品德.表示主观感情或态度的形容词.若形容词是描述逻辑主语(行为者即of后的sb)的性格、品质特征的形容词. 这个adj.是用来形容sb.的. of后的宾语能与前面的形容词构成主表关系. 这类形容词有:good(好的),kind(友善的),nice(友好的),polite(有礼貌的),clever(聪明的),foolish(愚蠢的),lazy(懒惰的), right(正直的)careful(细心的),careless(粗心的),right(正确的),wrong(错误的)wise, clever, nice, kind, silly,rude, wrong, right, foolish,natural, stupid, bad, brave,cruel, honest,naughty,wise,rude等.例如:It’s very kind of you to help me.(=You are very kind to help me.)你能帮助我,真好.It's very kind of you to look after my cat.你能照看我的猫,真好.It’s kind of you to say so.(=You are kind to say so)It’s very rude of her to say such words.(=She is very rude to say such words.)她说这样的话,真粗鲁.It’s foolish of him to go alone.(=He is foolish to go alone.)他单独出去太傻了.It's very nice of you to help me. 你来帮助我,你真是太好了.It’s clever of you to work out the maths problem. It's very kind of you to look after my cat.你真聪明,解出了这道数学题.It’s foolish of you to do that.It’s wrong of the other children to make fun of you.②“It’s+adj.+for+sb.+不定式”表示“做某事对某人来说怎么样”.常用于表示事物的特征特点,表示客观形式的形容词.若形容词是描述做的事情（即adj描述的是to do）,不是对不定式行为者的品格进行评价,用for sb.这类形容词有:important(重要的),necessary(必要的),difficult(困难的),easy(容易的),hard(艰难的),dangerous(危险的),safe(安全的),useful(有益的),pleasant(舒适的),interesting(有趣的),impossible(不可能的),right(正确的) likely(可能的)等，例如:It’s not easy for them to learn a foreign language.(=To learn a foreign language is not easy for them.)对于他们来说学好一门外语不容易.It's very hard for him to study two languages(=To study two languages is very hard for him).对他来说学两门外语是很难的.It’s very important for students to listen to teachers carefully.(=To listen to teachers carefully is very important for students.)对于学生来说上课认真听老师讲课是非常重要的.It’s necessary for us to get to school on time.(=T o get to school on time is necessary for us.)对于我们来说按时到校是非常必要的.It’s important for her to come to the party.=It is important that she should come to the party.对她来说来参加聚会很重要.It’s very dangerous for children to cross the busy street.对孩子们来说,穿过繁忙的街道很危险.It’s difficult for us to finish the work. 对我们来说,完成这项工作很困难.③注意:for 与of 的辨别方法:I.区别:1.含义上的区别:两种句型的主谓关系不一样.It is+adj+for sb to do. adj应该是对做这件事的评价;It is+adj+of sb to do sth. adj应该是对做这件事的人的评价,adj多用形容人的.①It is +adj+for sb to do sth. 形容词(for前的)是多用来形容一件事情(动词不定式所表示的动作),即修饰的是 to do sth. adj是do sth.的属性; sb.跟adj.没有直接联系. for是指干谋事会如何.It's plesant for us to take a walk after supper.②It is+adj+of sb to do sth. 形容词(of前的)是多用来形容人的;修饰的是介词of后面接的宾语. sb.跟adj.有直接联系.③实例辨析:It's very difficult for me to do it. (difficult 指事情很难)It's very kind of you to do it for me. (kind指人的品质好)It is more convenient for him to walk directly.对他来说,直接走过来比较便捷. (convenient 指事情很便捷)It is clever of him to come down without ropes.他很聪明,不用绳子就能下来. (convenient 指指人很聪明)2.逻辑结构上的区别:方法:取介词of/for后的代词作逻辑主语和介词前边的形容词作表语,造个句子.句子结构:“逻辑主语+be+形容词”.即:sb.is adj to do sth (不定式作句子的状语).如果道理上通顺用of,不通则用for.如:It is good for you to look at this book. 是说: ....对你有好处. 看这本书对你有好处.It is nice of you to give me such advice.是说: 你很好,感激你给我提供建议.*提取逻辑主语和形容词造句:It is nice of you to help me. 提取you与nice 可构成you are nice. (通顺,所以应用of).It's very kind of you to help me. 提取you与kind可构成you are kind. (通顺,所以应用of).It is good for you to look at this book.提取you与good可构成you are good(有好处的). (不通,所以应用for)It is hard for him to study two languages. 提取he与hard可构成he is hard(困难的). (不通,所以应用for)四.注意:of sb. 的句型通常都可转换为不定式作状语的句子,但for sb.句型不可以.It’s very nice of you to offer me a seat.= You are nice to offer me a seat. 十分感谢你给我让座.It is careless of him to lose so many things.= He is careless to lose so many things. 他丢了这么多东西,真是太粗心了.It’s very important for you to practise your oral English in daily life.在日常生活中练习你的英语口语非常重要的。
it +be+adj+to do sth的意思
it +be+adj+to do sth的意思
"It + be + adj + to do sth" 是一个常用的英语句型，其中 "it" 是一个形式主语，用来表示某件事情或某个状态。
这个句型通常用于描述某件事或某个状态的性质或特征。
这个句型的 "be" 是系动词，用来连接主语和表语，表示主语的特征或状态。
形容词 "adj" 用来描述主语的特征或状态，而 "to do sth" 则表示这个特征或状态与做某事有关。
以下是一些示例：
1.It is easy to learn English. (学习英语很容易。
)
2.It is important to have good eating habits. (养成良好的饮食习惯很重
要。
)
3.It is exciting to watch a football match. (观看足球比赛很激动人心。
)
总结来说，"It + be + adj + to do sth" 的意思是指某件事情或某个状态的特性或性质，与做某事有关。
【高中英语】高中英语语法之 IT 句型
【高中英语】高中英语语法之 IT 句型【高中英语】高中英语语法之it句型高中英语语法之"it"句型，希望同学们牢牢掌握，不断取得进步!是时候了今天是时候了。
是（某人）做某事的时候了。
例如：it'stimeforsupper/tohavesupper.（某人）有时到今天。
花费某人。
做某事的时间例如：ittookmeaweektofinishreadingthebook.3.我是斯特恩托斯。
轮到某人做某事了it'syourturntobeondutytomorrow.4.Itis/hasbeen+时间段+自+一般过去时。
从那以后已经很久了。
这种结构可以用于同义句与其他句型的转换。
例如：ithasbeentwoweekssincewemetlast.=twoweekshaspassedsincewemetlast.5.似乎/看见+那条。
这种结构可以转换成“see+不定式”的形式。
例如：itseemsthatheisill.=heseemstobeill.6.它是+adj.+of/forsb+不定式在徐振铎老师的文章中讨论了这个句型是用还是用。
这里还有另一个重点：如果形容词描述不定式演员的性格和品质，比如善良、善良、友善、利弗等，那么使用；如果它只是一个描述事物的形容词，例如困难、容易、困难、重要、危险等，那么就用它来形容。
例如：itwasverykindofyoutovisitmewheniwasill.这对他学习英语很重要。
7.it's+表语+todosth.。
如：这是一条步行街多哥是个好主意。
8.it's+adj.+that从句。
如：这可能会落后于其他学生。
以上就是为大家整理的高中英语语法之"it"句型，希望同学们阅读后会对自己有所帮助，祝大家阅读愉快。
牛津译林8BU6语法it is+adj句型
8BU6语法：it is+adj句型第一部分：it is+adj+to doIt is +adj. +to do sth.做…事怎么样在此句型中it是形式主语，真正的主语是后面的不定式部分，由于主语较长，为了避免头重脚轻，用it做形式主语。
有时it还可作为形式宾语，代替较长的宾语部分。
如：It is great to be with you.I find it interesting to watch the action film.拓展句型：①It is +n.+to do sth.如：It is a good idea to have a shower now.②It is +adj+that-clause.如：It is amazing that a snake eats little or nothing for months in cold winter.例题：①It can be frightening for anyone who is forced to step into a road because the pavement is blocked by a truck, a car or other badly parked vehicle.People can be when they have to step into a road where they cannot see the oncoming traffic.答案：frightened②The psychologists were surprised to find that rap and heavy metal fans were also shier and quieter than many other music lovers.It’s that rap and heavy metal fans are shier and quieter than many other music lover答案：surprising第二部分：it is+adj+for+sb to doIt is +adj. +for sb.+to do sth.对某人来说做…事怎么样此结构是一个陈述句, 表示说话人对客观事件的决断, 比较正式。
中考英语语法：it的9种主要句式
中考英语语法：it的9种主要句式it句型是初中英语中使用频率较多的重点句型之一，为了便于同学们搞好中考复习，现将常见有关it的主要句式归纳如下：1.“Itistimefor……”表示“是……时候了”。
句中介词for后接名词或代词作宾语。
如：It’stimeforschool.是上学的时候了。
2.“It’stimetodosth.”表示“是做某事的时候了”。
此句常与上句替换使用。
如：Itistimeforustohavelunch.=Itistimeforourlunch.是我们吃午饭的时候了。
3.在“Itseems……”句中，seem是不及物动词，常作系动词用，有“好像、似乎”的意思，后面可跟动词不定式、形容词作表语，也可跟从句。
如：Itseemedthatnobodyknewanythingaboutthematter.看来没有人知道这件事。
4.“It’sone’sturntodosth.”表示“轮到某人做某事了”。
如：It’syourturntoplayping-pong.该轮到你打乒乓球了。
5.“Itis+形容词+todosth.”表示“做某事怎么样”。
其中it作形式主语，代替后面的不定式todosth.(真正主语)。
如：ItiseasytospeakEnglish.说英语很容易。
6.“Itis+形容词+forsb.+todosth.”意为“对某人来说做某事怎么样”。
这种结构中的形容词常常是easy，difficult，hard，important，necessary，quick等，这些形容词常与事物的特征有关。
如：Itisquitedifficultforustofindoutwhobrokethewindows.对我们来说，查明是谁打破了窗户是相当难的。
7.“Itis+形容词+ofsb.+todosth.”表示“某人做某事怎样”。
这种结构中的形容词常常是：good，kind，nice，wrong，clever等，这些形容词常与人的性格特点有关。
It-is-+-adj+to-do-sth句型
I t i s+形容词+t o d o的讲解和用法1）It is +形容词to do…. 表示“干某事是…”。
我们通常在口语或者写作中使用这个句型，对于初中的学生来说，十分有必要熟练地掌握好这个句型，它有利于我们在写作中写出结构比较复杂的句子，从而得到较高分数。
例如：1. It's very important to study English well. 学好英语很重要。
2. It is difficult to finish the work today. 今天完成工作太困难了。
3. It's good to eat fruits. 吃水果好。
4. It's right to read English every day. 每天读英语是对的。
5. It's interesting to play soccer. 踢足球是有趣的。
2）即学即练1.It_________ take a bus to go to school.A.is convinientB.is convinient toC.are convinient toD.are convinient2. It is ___________ the old man.A.good to helpingB.good helpC.good to helpD.to help3.It to smoke.A. are badB.is bad toC.is badD.are bad to4.It _____________ see that movie.A. are thrillingB.is thrilling toC.is thrillingD.are thrilling to5.It _______________ go fishing.A. are excitingB. are exciting toC.is excitingD. is exciting to6.It is interesting to play computer games.A. are interestingB. are interesting toC.is interestingD. is interesting to3) 英译汉1.It is safe to take a bus.2.It is funny to watch movies.3.It is possible to see him now.4.It is dangerous to play with a snake.5.It is diffcult to write a English composition(作文).6.It is wonderful to go fishing with my father.7.It is boring to listen to a same song again and again(反复).8.It is hard to be successful man.9.It is pleasant to come back to my hometown.10.It is horrible to see this bad man.4）课后作业1.熟记下列词组difficult to fall asleep 难以入睡easy to read 容易读impossible to find 不可能找到possible to get there 可能到那里nice to live 适合居住safe to live 住起来安全difficult to understand 难以理解pleasant to visit 参观起来令人开心boring to listen to 听起来枯燥hard to plant 难以种植easy to learn易学wonderful to watch 看起来很棒2.巩固复习：根据所给的形容词填空bad, difficult, ill, asleep, impossible1.Mother：Honey！It is too late. You should fall ________now.Son: It is ___________to sleep tonight. I feel __________.Mother: Oh, you looks ________. It is so late, it is ________to take you to the hospital.awake, safe, happy, nice, alone2. Mary:Hello! Are you __________? Lily:Hello! Yes, I am.Mary: Do you like you new house?Lily: Oh, yes. It is ________ to live. But it keep me ______. Mary:You are not __________.Lily:That’s right. But I like it, beause it is _______ to live here.。
It is + adj+to do sth句型
It is+形容词+to do的讲解和用法1）It is +形容词to do…. 表示“干某事是…”。
我们通常在口语或者写作中使用这个句型，对于初中的学生来说，十分有必要熟练地掌握好这个句型，它有利于我们在写作中写出结构比较复杂的句子，从而得到较高分数。
例如：1. It's very important to study English well. 学好英语很重要。
2. It is difficult to finish the work today. 今天完成工作太困难了。
3. It's good to eat fruits. 吃水果好。
4. It's right to read English every day. 每天读英语是对的。
5. It's interesting to play soccer. 踢足球是有趣的。
2）即学即练1.It_________ take a bus to go to school.A.is convinientB.is convinient toC.are convinient toD.are convinient2. It is ___________ the old man.A.good to helpingB.good helpC.good to helpD.to help3.It to smoke.A. are badB.is bad toC.is badD.are bad to4.It _____________ see that movie.A. are thrillingB.is thrilling toC.is thrillingD.are thrilling to5.It _______________ go fishing.A. are excitingB. are exciting toC.is excitingD. is exciting to6.It is interesting to play computer games.A. are interestingB. are interesting toC.is interestingD. is interesting to3) 英译汉1.It is safe to take a bus.2.It is funny to watch movies.3.It is possible to see him now.4.It is dangerous to play with a snake.5.It is diffcult to write a English composition(作文).6.It is wonderful to go fishing with my father.7.It is boring to listen to a same song again and again(反复).8.It is hard to be successful man.9.It is pleasant to come back to my hometown.10.It is horrible to see this bad man.4）课后作业1.熟记下列词组difficult to fall asleep 难以入睡easy to read 容易读impossible to find 不可能找到possible to get there 可能到那里nice to live 适合居住safe to live 住起来安全difficult to understand 难以理解pleasant to visit 参观起来令人开心boring to listen to 听起来枯燥hard to plant 难以种植easy to learn易学wonderful to watch 看起来很棒2.巩固复习：根据所给的形容词填空bad, difficult, ill, asleep, impossible1.Mother：Honey！It is too late. You should fall ________now. Son: It is ___________to sleep tonight. I feel __________. Mother: Oh, you looks ________. It is so late, it is ________to take you to the hospital.awake, safe, happy, nice, alone2. Mary:Hello! Are you __________? Lily:Hello! Yes, I am.Mary: Do you like you new house?Lily: Oh, yes. It is ________ to live. But it keep me ______. Mary:You are not __________.Lily:That’s right. But I like it, beause it is _______ to live here.。
Itis+adj+forsbtodosth与Itis+adj+ofsbtodosth有何区别？
Itis+adj+forsbtodosth与Itis+adj+ofsbtodosth有何区别？展开全文It is+adj.+of sb. +to do sth中的adj.跟sb.有关,这个adj.是用来形容sb.的,表示某人这么做真是太adj.了．你会发现在这个句型中你把sb.和adj.提出来可以造个句sb. is(are) adj.如It‘s very kind of you to help me.把里面的sb.和adj.提出来可以发现you are kind是说得通的.而It is +adj.+for sb.+to do sth表示做某事对某人来说很adj.这里的adj.是do sth.的属性里面的sb.跟adj.没有直接联系如It‘s difficult for you to deal with the problem.你就不能说you are difficult了吧这就是怎么决定句子中的介词用of还是用for的方法若形容词是描述不定式行为者的性格、品质的，如kind，good，nice，right，wrong，clever，careless，polite，foolish等，用of sb.。
It’s very kind of you to help me. 你能帮我，真好。
It’s clever of you to work out the maths problem.你真聪明，解出了这道数学题。
若形容词仅仅是描述事物，不是对不定式行为者的品格进行评价，用for sb.，这类形容词有difficult，easy，hard，important，dangerous，（im）possible等。
It’s very dangerous for children to cross the busy street.对孩子们来说，穿过繁忙的街道很危险。
It’s difficult for us to finish the work. 对我们来说，完成这项工作很困难。
九年级英语-Itis+adj.+of-sb.+to-do-sth知识讲解
Revision:
It is + adj. + for sb. +to do sth.
翻译下列两句话：
1.对我们来说学好各门课程很重要。 It's important for us to learn all the subjects well.
2.对你来说不交作业是不可能的。 It's impossible for you not to hand in your homework.
Comparation: 1.It is impossible for me to finish
the work in an hour. 2. It is kind of you to help me
It’s honest of him to tell the truth. = He is honest to tell the truth. 他能把事实讲出真是太诚实了。
It’s stupid/foolish/silly of Lily to do so. =Lily is stupid to do so. 莉莉那样做真是太愚蠢了。
Exercise:
1.It’s clever ___ you ___ so many toy ships. A. of; making B. of; to make C. for; to make D. for; making 2. It’s ___ for us ___ polite in class. A. interesting, to become B. good, to C important, to. D. necessary, to be
it 句型
高中写作句式
1.It is +adj / n. + (for sb) +to do 该句型中的形容词有：
必要的：necessary , compulsory 重要的： essential , crucial ,
困难的challenging ,
实际的, 可操作的： practical
明显的：crystal clear ,
该句型中的名词有：
our duty / responsibility / right a good idea , a pity ,an honor , 翻译：
1.所有的学生在学校必须穿校服
(compulsory )
2.当你网购得时候, 不要泄露个人信
息很重要.
3.制造商提升商品的质量很关键.
4.这里很难租到三室一厅的房子.
5.显然, 我们要马上采取切实可行的
措施.
6.每个文明市民都要责任遵守交通规
则.
7.很遗憾,几乎没人能遵守诺言.
8.我们很荣幸品尝到了这些美食.
9.很多人认为政府决定在这里修建高
铁真的很好. (high speed railway)
熬夜会增加我们生病的风险. 晚上不睡会让我们在白天疲劳困倦. 为了晚上不学习太晚, 我们要在白天把作业做好. 另外,玩电脑游戏会浪费我们宝贵的时间甚至对健康有害.。
主语+动词+it+adj+todo
主语+动词+it+adj+todo
这个句型是英语中的一种形式，叫做"It is adj to do"。
它的意思是"做某事是（非常）adj的"。
在这个句型中，主语通常是it，而动词是is或was，adj则是一个形容词，表示某种程度上的好或坏。
举个例子，如果说"It is important to exercise regularly"，那么意思就是"定期锻炼是非常重要的"。
在这个例子中，it是主语，is是动词，important是形容词。
这个句型可以用来表达各种不同的情况。
比如说，"It is difficult to learn a new language"（学习新语言很难）"It is easy to make mistakes"（犯错误很容易），"It is fun to play video games"（玩电子游戏很有趣）等等。
主语+动词+it+adj+todo的形式可以帮助我们表达一些抽象或主观的想法，让语言更加生动、形象。
itisof和for的用法与区别
it is of和for的用法与区别
it is of 表示名词、代词等与句中其他词的关系，在句中不能单独作句子成分。
介词后面一般有名词、代词或相当于名词的其他词类、短语或从句作它的宾语，表示与其他成分的关系；
It is for用法：它的宾语构成介词词组，在句中作状语，表语，补语，定语或介词宾语。
同时介词的用法也很灵活，同一个介词可以表达多种意义
扩展资料
侧重点不同
1.It is+adj.+of侧重点：有of的句子，句中的`形容词修饰的是人，作表语说明人的特质。
2.It is+adj.+for侧重点：有for的句子，句中的形容词修饰的是后面to do的部分，与人无关。
It is of first importance to spread cultural and scientific knowledge among the people.
普及文化科学是头等重要的。
It is of convenient length.
它的长度合适。
It is for this reason that television proves such a boon to so many people
就是因为这个原因，电视才会给这么多人带来如此大的便利。
I don't have to tell you how important it is for you to keep your mouth shut about all this
我不用告诉你，你自己也知道对所有这些事保密有多重要了吧。
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一、复习巩固（一）背诵：名词前多个形容词排序的口诀限定描绘大长高，形状年龄和新老；颜色国籍跟材料，作用类别往后靠。
分别解释为：限：限定词。
the， my， a，this…描：描绘性形容词。
brave， beautiful， lovely，nice…大：大小、高低、长短等形容词。
big，large，small…形：形状。
round，square…龄：年龄大小、新旧、年代等。
young，old，new…颜：颜色。
red，blue，green…籍：国籍、地区、出处。
Chinese，America，Japanese…物：物质材料的形容词。
golden，wooden，wax…类：表示类别、用途。
medical，chemical，writing…（二）形容词的正确排序1．（Canadian ，extraordinary ，an ，new）play Array 2．（green，a，large）garden3．（gold，British，the，round）coin 4．（ugly，writing，the，steel，seven）desks5．（purple ，Russian ，nice ，long ，her）coat二、表语形容词专题讲解1) 表语是用来说明主语的性质,身份,特征和状态。
表语形容词：在句中只能作表语，不能作定语的形容词叫表语形容词。
常放在系动词后面。
表语形容词大多数以元音字母开头。
这类词有：afraid（担心的）, alike（相似的）, alive（活泼的，有生气的）, alone（孤单的）, asleep（睡着的）, awake（清醒的）, ill（生病的）常见的系动词：❤be动词（am, is, are, was, were）❤表“保持”:stay, keep❤表示“看起来像”这一概念的动词：seem, look;❤感官动词: feel ,look ,smell, taste, sound 等❤表示“主语变成什么样”（变得）这一概念的动词：grow, get, turn, go, become等例句：（1）She looks bored and tired. 她看起来很无聊且疲惫不堪。
（2）He looked worried and ill. 他显得忧虑，且带有病色。
（3）The food tastes delicious. 这些食物很好吃。
（4）The game is interesting. 这是一个有趣的游戏。
（5）The story sounds true. 这个故事听起来像真的。
（6）She is afraid of dogs. 她怕狗（7）He gets wet, because it rains very heavily.因为下雨，他被淋湿了。
(8) The fish went bad. 这鱼变臭了。
（9）Now the baby is asleep. 现在孩子睡着了。
（10）He was alone in the house. 他独自一人在家里。
（11）Neither of the sisters was alive. 两姐妹都不在人世了。
2) 即学即练（补充句子）1. 她的奶奶看起来生病了。
Her grandmother_____________.2. 所有的音乐对我来讲都一样。
All music ____________ to me.3. 你的母亲是否健在？______ your mother still_______?4. 当他跟妈妈在一起的时候，他觉得很幸福。
He _________________, when he stays with his mother.5.我们睡着时，也需要少量的空气。
When we______________, we need less air.6. 保持清醒的大脑会使你整个人都年轻起来。
Keep your mind _________ and you'll stay young all over.7. 你在上课时睡觉了，比尔？Did you fall _________ in class, Bill?8. 我独自一人和我的五只猫生活着。
I live ____________ with my five cats.三、It is+形容词+to do的讲解和用法1）It is +形容词to do…. 表示“干某事是…”。
我们通常在口语或者写作中使用这个句型，对于初中的学生来说，十分有必要熟练地掌握好这个句型，它有利于我们在写作中写出结构比较复杂的句子，从而得到较高分数。
例如：1. It's very important to study English well. 学好英语很重要。
2. It is difficult to finish the work today.今天完成工作太困难了。
3. It's good to eat fruits. 吃水果好。
4. It's right to read English every day. 每天读英语是对的。
5. It's interesting to play soccer. 踢足球是有趣的。
2）即学即练1.It_________ take a bus to go to school.A.is convinientB.is convinient toC.are convinient toD.are convinient2. It is ___________ the old man.A.good to helpingB.good helpC.good to helpD.to help3.It is bad to smoke.A. are badB.is bad toC.is badD.are bad to4.It _____________ see that movie.A. are thrillingB.is thrilling toC.is thrillingD.are thrilling to5.It _______________ go fishing.A. are excitingB. are exciting toC.is excitingD. is exciting to6.It is interesting to play computer games.A. are interestingB. are interesting toC.is interestingD. is interesting to3) 英译汉1.It is safe to take a bus.2.It is funny to watch movies.3.It is possible to see him now.4.It is dangerous to play with a snake.5.It is diffcult to write a English composition(作文).6.It is wonderful to go fishing with my father.7.It is boring to listen to a same song again and again(反复).8.It is hard to be successful man.9.It is pleasant to come back to my hometown.10.It is horrible to see this bad man.四、课后作业1）熟记下列词组difficult to fall asleep 难以入睡easy to read 容易读impossible to find 不可能找到possible to get there 可能到那里nice to live 适合居住safe to live 住起来安全difficult to understand 难以理解pleasant to visit 参观起来令人开心boring to listen to 听起来枯燥hard to plant 难以种植easy to learn 易学wonderful to watch 看起来很棒2）巩固复习：根据所给的形容词填空bad, difficult, ill, asleep, impossible1.Mother：Honey！It is too late. You should fall ________now. Son: It is ___________to sleep tonight. I feel __________. Mother: Oh, you looks ________. It is so late, it is ________to take you to the hospital.awake, safe, happy, nice, alone2. Mary:Hello! Are you __________?Lily:Hello! Yes, I am.Mary: Do you like you new house?Lily: Oh, yes. It is ________ to live. But it keep me ______. Mary:You are not __________.Lily:That’s right. But I like it, beause it is _______ to live here.。