句型：it is adj for sb to do sth
表示说话人对客观事件的决断, 意为：“做…是…的”。其中it是这个句子的形式主语，真正的主语是to do sth.
例如：读书很有趣。It is very interesting to read.
看书是有用的。It is useful to read.
每天跑步是健康的。It is healthy to run every day
解出道题对我来说有点难。It is a little difficult for me to work out this question.
不完成作业是糟糕的。It is bad not to finish homework.
迟到是糟糕的。It is bad to be late for school.
1.it is adj (for sb) to do sth可以与“动名词v-ting be adj”的句型互换。
例如：It is very interesting to read.=Reading is very interesting.
It is very useful to read.=_________ is very useful.
It is healthy to run every day.=_______________________ is healthy.
It is a little difficult for me to work out this question.
=_____________________ is a little difficult ___________.
It is bad not to finish homework.=________________________ is bad.
It is bad to be late for school.=_____________________is bad.
2. 注意：(1)在转换句型的时候一定要把原句中的不定式(not )to do改成(not) doing，在句子中充当主语。正是由于to do sth 才是真正的主语，才可以实现句型转换。
(2)因为for是介词，介词后面跟宾语，所以sb如果是代词的话，要用宾格。
(3)for sb这个部分可有可无，主要看句子的意思。
(4)这个句型中的形容词是用来形容to do sth这件事的，而不是形容sb。
练习：
1.收到你的来信真是令人兴奋。It is __________ to _______ _______ _______.
__________ _______ _____ is ___________.
2.早起对于她来说很容易。It is ______ ______ for ________ to _____ _____ _______.
_________ ____ _______ is _______ _______ for ________.
3.读报很有趣。It is ______ ___________ to read newspapers.
__________ ____________ is ______ ___________.
4.对于孩子们来说，在河里游泳很危险。
_____________________________________________________________.
=____________________________________________________________.
5.小心驾驶是非常重要的。It is ________ ________ to ______ ______________.
_______ _________ is _________ __________.
练习
1.It_________ take a bus to go to school.A.is convinient
B.is convinient to
C.are convinient to
D.are convinient
2. It is ___________ the old man.
A.good to helping
B.good help
C.good to help
D.to help
3.It for us to smoke.
A. are bad
B.is bad to
C.is bad
D.are bad to
4.It _____________ see that movie.
A. are thrilling
B.is thrilling to
C.is thrilling
D.are thrilling to
5.It ____________ go fishing.
A. are exciting
B. are exciting to
C.is exciting
D. is exciting to
6.It _______ play computer games.
A. are interesting
B. are interesting to
C.is interesting
D. is interesting to 1-3 B C B 4-6 B D D
中译英
1、学好英语对学生很重要。
2、今天完成工作太困难了。
3、吃水果对我们好。
4、每天读英语是对的。
5、踢足球是有趣的。
1. It's very important for students to study English well.
2. It is difficult to finish the work today.
3. It's good for us to eat fruits.
4. It's right to read English every day.
5. It's interesting to play soccer.
中译英：
1 搭巴士是安全的。
2 看电影很有趣。
3 玩蛇是很危险的。
4 每天早上4点起床是很难的。
5 对她来说，再回到家乡很开心。
6 对我来说，和爸爸一起钓鱼很美好
7 对他们来说，反复听这个故事很无聊。
8 对孩子们来说，爬这座高山很难。
1.It is safe to take a bus.
2.It is funny to watch movies.
3.It is dangerous to play with a snake.
4.It is difficult for her to get up at four every day.
5.It is happy to come back to my hometown.
6.It is wonderful for me to go fishing with my father.
7.It is boring for them to listen to a same song again and again(反复).
8.It is hard for children to climb the high mountain.
句型：it is adj of sb (not)to do sth该句型通常表示说话人对客观事件的惊讶、兴奋、懊悔、难过等感叹情绪，与it is adj (for sb) (not) to do sth的意义不同。
例如：It is very kind of you to help me.你能帮助我，真是太好了。
It is very clever of you to work out this question.你能解出这道题目，真是太聪明了。
It is very wise(明智的) of you to read this novel.你看这本小说，真是太明智的。
1.这个句型中用介词of而不是for的原因是因为这里的形容词是用来形容人的品质性格的，属于
这类形容词的有foolish、stupid、wise、kind、friendly、nice、careful、careless、polite、impolite 等等，因此区分是用It is adj of sb (not) to do sth还是用it is adj for sb (not) to do sth，要清楚adj 修饰的是sb还是to do sth.
例如：It is nice for me to have breakfast with you.(nice是指have breakfast with you这件事) 对于我来说，能和你一起吃早餐真好。
It is nice of you to help him with his English.(nice是指you，形容人的品质)
你帮他补习英语，真是太好了。
2.it is adj of sb to do sth这个句型可以与sb be adj to do sth.
例如：It is very kind of you to help me.
=_______ _____ very kind to ________ _______.
It is very clever of you to work out this question.
=You are ______ _______to ______ _______this question.
It is very wise(明智的) of him to read this novel.
=______ ______ very wise to _______ this novel.
3.(1)在It Is adj of sb to do sth这个句型中，of sb不可以省略。
在it is adj for sb to do sth这个句型中，for sb可以省略。
(2)of和for一样，都是介词，后面跟的是宾语或代词的宾格，因此在句型转换的时候要将宾格改为主格。
练习：
1收到你的来信真是令人兴奋。
2早起对于她来说很容易。
3读报很有趣。
4对于孩子们来说，在河里游泳很危险。
5小心驾驶是非常重要的。
6你能帮助我，真是太好了。
7 你能解出这道题目，真是太聪明了。
8 你看这本小说，真是太明智的。
9 对于我来说，能和你一起吃早餐真好。
10 你帮他补习英语，真是太好了。
1 It is excited to hear from you.
2 It is easy for her to get up early.
3 It is interesting to read newspaper.
4 It is dangerous for children to swim in the river.5 It is very important to drive carefully.
6 It is very kind of you to help me.
7 It is very clever of you to work out this question.
8 It is very wise of you to read this novel.
9 It is nice for me to have breakfast with you.
10 It is nice of you to help him with his English.
完成句子
1.我们相互帮助是非常重要的。
________ _______ very important for us ________ ________each other.
2.对我们来说学习英语是有很大帮助的。
_______ helpful ________ _________ _________ _________ English.
3.她同意接受这个任务是明智的。
________ is wise _______ her _____ agree to take that task.
4.嘲笑别人是不礼貌的。
________ is not polite________ _______ ______ others.
5.对于他们很容易算出这道数学题。
________ ________ _______ work out the maths problem.
完成句子
1.我们相互帮助是非常重要的。
________ _______ very important for us ________ ________each other.
2.对我们来说学习英语是有很大帮助的。
_______ helpful ________ _________ _________ _________ English.
3.她同意接受这个任务是明智的。
________ is wise _______ her _____ agree to take that task.
4.嘲笑别人是不礼貌的。
________ is not polite________ _______ ______ others.
5.对于他们很容易算出这道数学题。
________ ________ _______ work out the maths problem.
完成句子答案：
1.It is to help 2 It; for us to learn 3 It of to 4 It to laugh at 5 It’s easy to下载本文
