Unit5 Save the endangered animals 语法形容词的句型

形容词的相关句型
A It is + adj. + for + n. / pron. + to + v.
句型“It is + adj. +for somebody to do something”表示“对某人来说，做某事是……的”。其中的形容词是对所做的事情进行描述，如difficult, easy, hard, important, necessary, dangerous, possible, convenient等。
Eg: It’s very dangerous for children to cross the busy road by themselves.
对孩子们来说，独自穿过繁忙的马路很危险。
It’s difficult for us to finish the work. 对我们来说，完成这项工作很困难。
此类句型中，主语是一个不定式短语。为了避免因主语过长造成“头重脚轻”，所以常用it做形式主语，而将真正的主语（不定式短语）放到后面。因此以上两句相当于：
Eg: To cross the busy street by themselves is very dangerous for children.
To finish the work is difficult for us.
练习一
对孩子们来说，穿过繁忙的街道很危险。
It’s very________ ________ children to cross the busy street.
对我们来说，完成这项工作很困难。
It’s ________ ________ us to finish the work.
拥有健康的饮食习惯对我们来说很必要。
It’s ________ ________ us to have healthy eating habits.
保护环境对我们来说很重要。
It’s ________ ________ us to protect the environment.
B It is + adj. + of + n. / pron. + to + v.
句型“It is + adj. +of somebody to do something”的意思是“某人做某事真是太……了”。其中的形容词是对人的性格、品质进行描述，如kind, good, nice, clever, careless, polite, foolish等。
Eg: It’s very kind of you to help me. 你来帮我，你真好。
It was clever of him to work out the maths problem. 他真聪明，解出了这道数学题。
这个句型可以转换成：somebody +be + adjective + to do something.
Eg: You’re kind to help me.
He was clever to work out the maths problem.
练习二
你离开他是很明智。
It is______ _______ you to leave him.
你能帮我，真好。
It’s very_______ ______ you to help me.
你真聪明，解出了这道数学题。
It’s_______ _______ you to work out the maths problem.
练一练：
It’s kind of you to help me. = ______________________________.
____________________________. = You are right to do that.
C adj. + enough + to + v.
句型“somebody / something + be + adj. + enough to do something”意思是“某人或某物足够……，可以做某事”。注意enough放在形容词后面，表示达到必要的程度。
Eg: He is strong enough to lift the big stone. 他强壮得足以举起这块大石头。
The room is not big enough to hold 20 people. 这个房间不够大,容纳不了20人。
拓展：此句型的否定形式可与too... to... (太…而不能…), so... that... (太…以致于…)句型互相转换。
Eg: The room is too small to hold 20 people.
The room is so small that it cannot hold 20 people. 这个房间太小，容纳不了20人。
练习三
他足够大以至于能完成这项任务. He is________ ________ ________ finish this task.
他足够聪明可以顺利地做一名领导者. He is_______ _______ _______ be a leader.
It is difficult enough________ _______ _______ this problem.(work out)
He is rich enough_______ _______ this new car.(buy)
She is pretty enough_______ _______ the gentlemen.(attract)
练一练：
John is strong enough to carry the box. =______________________________.
中考链接
( )1. It’s necessary for us _______ English well.
A. to learn B. learning C. learn D. learned
( )2. It’s very dangerous for us _______ the mobile phone while crossing the street.
A. answering B. to answer C. answer D. answers
( )3. It’s very kind _______ you to lend me your reusable shopping bags.
A. of B. for C. to D. with
( )4. — It’s ________ to stick your chopsticks into your food while having dinner.
— I’m sorry. I won’t do that again.
A. kind B. polite C. rude D. proud
( )5. — Was it necessary ________ John some photos before helping the old man
— I think so. In this way, he could protect himself later.
A. of; taking B. for; taking C. of; to take D. for; to take
Exercise
一、选择for或of填空。
1 It was brave _________ him to save the girl.
2 It is difficult _________ such a little boy to run fast.
3 It’s polite_______ you to keep quiet when you’re eating.
4 It was kind _________ you to help those poor children.
5 It was impolite _______ him to leave without saying goodbye.
6 Isn’t it cruel ________ you to kill the bird
7 It is possible _______ him to get there on time.
8 It was silly ________ you to leave the keys at home.
9 Is it important _________ us to learn a foreign language
10 It was nice _________ her to give the seat to an old man.
二、单项选择。
( )1.______ is really hard _______ them to climb such a high mountain.
A. This, to B. It, to C. This, for D. It, for
( )2. She’s not strong enough _____ walking up mountains.
A. to go B. going C. go D. went
( )3. It’s quite easy _______ her to answer this question.
A. for B. of C. to D. with
( )4. The classroom is not ______ for more than 40 students together.
A. enough large B. large enough C. so large D. too large
( )5. _______ dangerous _______ children to clime high.
A. It is; of B. That is; of C. It is; for D. That is; for
( )6.The water in this village is not _______.
A. enough clean to drink B. enough clean drinking
C. clean enough to drink D. clean enough drinking
( )7. It’s so kind ________ her to help save the animals.
A. for B. of C. to D. with
三、完成句子。
1 这个小女孩够友好来交到许多朋友了。
The little girl is _______ ________ to make many friends.
2 对于我们来说，三天内完成这项工作是不可能的。
________ ________ impossible for us ________ ________ the job in three days.
3 保护环境对我们来说很重要。
_______ _______ very important _______ _______ to protect the environment.
4 她够勇敢，抓住了小偷。
It is brave ________ ________ to catch the thief.
5 这个书包太小了，装不下15本书。
The schoolbag is _________ small ________ carry 15 books.
6 老虎足够强壮来保护自己。
Tigers are strong enough ________ ________ themselves.
四、书面表达
请以“Saving Tigers”为题，为某中学生英文报专栏写一篇80词左右的征文稿，内容要点如下：
1.老虎是人们在动物园里最喜欢观看的动物之一。
2.现在世界上仅存大约3200只老虎，数目日趋减少。
3.老虎处境危险的原因。
4.保护老虎的建议。
写作技巧点拨：
1.根据本单元所学到的内容：谈世界上濒危动物之一-----大熊猫，结合所学句型，广泛思考，进行仿写：点明老虎的现存数量等。
2.提出保护老虎的建议要有条理。