He looks too funny not to attract notice．
The impression remains too deep to be forgotten（被动式）.
He is too young to be trusted．
The child（不定式teach的意义上的宾语）is too wild to teach．
That is too painful to forget．
The room is too small for ten boys（意义上的主语）to sleep in．
The old man is too serious for us to speak to．
He is too young to be criticizing anybody．
He seems young enough（or sufficiently young）to study．（=He seems so young that he can study．）
This rope is strong enough to last long．
The book is good enough for me to read．
This weather is pleasant enough to spend our Sunday in．
（比较：He cannot be too old to study．或He is never too old to study．=He is not too old．He can study yet．）
He is strong enough to lift this iron bar．（He “can lift” it．）（正确）
He is so strong as to lift this iron bar．（=He is so strong that he “lifts” this iron.）（错误）
He was so kind as to lend me the money．（=He was so kind that he lent me the money．=He is such a kind-hearted person as to lend me the money．）
The dog was so tired as to sleep all day．
He is so cruel as to kill his wife．（=He is such a cruel man as to kill his wife．）
1132 注意：“be＋形容词＋不定式”的结构很容易用错。
It is impossible to convince him．（正确，to convince him为主语，由it代表）
That is impossible to convince him．（错误，that不能代表后面的不定式）
I am impossible to convince him．（错误，impossible不能用来指人）
I am unable to convince him．（正确）
I am easy to catch cold．（错误，easy不能用来指人）
I am liable to catch cold．（正确）
I am probable to catch cold．（错误）
I am likely to catch cold．（正确）
I am impossible to convince him．（错误）
It is impossible for me to convince him．（正确）
I find it impossible to convince him．（正确）
I am necessary（or convenient，easy，urgent，hard，difficult，troublesome）to convince him．（错误）
It is necessary（or urgent，etc．）for me to convince him．（正确）
I find it necessary（or urgent，etc．）to convince him．（正确）
The bridge is dangerous to pass it．（错误）
The bridge is dangerous to pass．（正确）
The scene is sad to see it．（错误）
The scene is sad to see．（正确）
I am lazy to advise him．（错误）
I am too lazy to advise him．（正确）
She is enthusiastic to advise him．（错误）
She is enthusiastic enough to advise him．（正确）
He is weak to walk farther．（错误）
He is too weak to walk farther．（正确）
The dog is clever to understand you．（错误）
The dog is clever enough to understand you．（正确）
The road is long to reach your village．（错误）
The road is long enough to reach your village．（正确）
The bag is heavy for me to carry．（错误）
The bag is too heavy for me to carry．（正确）
He was quiet to speak．（错误）
He spoke quietly．（正确）
He was easy to do so．（错误）
He found it easy to do so．（正确）
He was fast to read．（错误）
He read fast．（正确）
The storm was violent to roar．（错误）
The storm roared violently．（正确）
He is hard to work．（错误）
He works hard．（正确）
另外，1128—1131节中的形容词都放在系动词后，它们也可紧跟在名词后面。
The man impatient（=eagerly wishing）to start began to shout．
My youngest son，anxious（=longing）to learn English，entered an English school．
Mary，afraid to go alone at night，had Lilian for her companion．
The horse likely（=which will probably）to win may lose at the last minute．
Men unfit（=who cannot）to work are highly paid and men able（=who can）to work are jobless．
Don't ask a question impossible to answer（=which is impossible to answer）.
That is not a path safe for strangers to drive along．
Can there be any man too old to study（=who is so old that he cannot study）?
Find a man strong enough to break open this box．
A man so cruel as to kill his wife and children may love his dog．
4．起形容词作用的不定式
1133 不定式可以起形容词的作用，用来修饰名词。和形容词一样，它可以用在a．名词前面，b．名词后面，c．系动词后面及d．宾补动词后面。
a．用在名词前作定语的不定式
1134 除了构成合成形容词，不定式从不用在名词前面作定语。
His never-to-be-executed plan is well-known．
A soon-to-be-built bridge will cross this river．
A strongly-to-be-desired reform should be carried on．
An ever-to-be-remembered occasion took place yesterday．
There is a To-Let board nailed to the door．
An easy-to-see sign was over the gate．
b．用在名词后面作定语的不定式
1135 作定语的不定式通常放在它所修饰的名词后面，但是在名词后用不定式作定语并不是很容易的，不定式和它所修饰的名词之间要有一些特定的关系。不定式和它所修饰的名词之间有10种不同的关系：（1）及物动词和宾语的关系，（2）宾补动词与补语的关系，（3）形容词与状语的关系，（4）主语和动词的关系，等等。
(1)His fear（=That he fears）to see her former wife is natural．［比较：He fears（及物动词）to see（宾语）her．］
(2)His invitation（=That he invited someone）to attend the wedding was true．［比较：He invited（宾补动词）someone to attend（补语）the wedding．］
(3)His eagerness（=That he is eager）to help her mother is doubtful．［比较：He is eager（形容词）to help（状语）her mother．］
(4)He has a brother to teach him（=who will—or may，can，must，should—teach him）．［比较：A brother（主语）will...teach（动词）him．］
(5)He has a book to read（=which he will—or may，can，must，should—read）．［比较：He will...read（及物动词）a book（宾语）．］
(6)He has a house to live in（=which he may live in）．［比较：He may live in（由不及物动词构成的及物动词短语）a house（宾语）．］
(7)He has a child to take care of（=which he must take care of）．［比较：He must take care of（由及物动词构成的及物动词短语）a child（宾语）．］
(8)I don't understand his idea to send his son to Sahara．［比较：I don't understand his idea（主体词），that is，to send（同位语）his son to Sahara．］
(9)That is a peculiar way to make（=of making，in which one can make）money．［比较：That is a peculiar way of making money（定语短语）.］
(10)He has the goodness（=is good enough）to help me．
1136 总之，在名词后作定语的不定式必须具备下面5项条件之一：
(1)被修饰名词必须表示一种意图，不定式必须用作同位语，和这个名词紧密相连，名词为其主体词，如1135节中（1）、（2）、（3）类句子。
（a）An attempt（主体词）to climb（同位语）the mountain will be made．（=An attempt，that is，to climb，etc．）
She feels an inclination to eat something sour．
Her refusal to please her mother is amazing．
The tendency has been strong to wear long hair．（同位语间或可与主体词分开）
A plan was devised for children to play games．（带有意义上的主语）
（b）The order（主体词）to start（同位语）was given．
I get permission to see the President．
You are under no obligation to flatter anyone．
The order for the army to start was given．（带有意义上的主语）
（c）He does not have any ambition（主体词）to become（同位语）famous．
I can understand his impatience to see the boss．
His anxiety to meet her is rather unusual．
(2)不定式应带有may，can，must，will或should这类助动词的含义，如1135节中（4）、（5）、（6）、（7）几类句子。
（d）He recommended Mary to advise（=who can advise）Ada．
He needs love to strengthen his broken heart．
He has many friends to help（=who will help）him．
（e）He has nothing to do（=which he can do）．
He offered me coffee to drink（=which I may drink）．
He has work to do（=which he must do）．
I ordered three hamburgers to take out．
Have you any letter to write（=which you must write）?（但：to be written=which must be written by others）
（f）He has no friend to talk with（=with whom he can talk）．
That is a good place to get away from．（正式说法：from which to get away）
We have no proof to go to the police with．
（g）He can find no-one to make friends with（=with whom he can make friends）．（正式说法：with whom to make friends）
There are some points to pay attention to.
另外，不定式所修饰的名词可以是及物动词、双宾动词或及物动词短语的宾语。
He has no time to spare．（time作为及物动词has的宾语）
He has children to teach．
He wants water to drink．
I found no good movies to enjoy．
You can take his book to read．
He bought it for me to use．（带有意义上的主语）
He offered me some tea（作双宾动词offered的直接宾语）to refresh my spirit with．
He gave me bread to eat．
They left us a lot of problems to solve．
I lent him a book to kill time with．
He brought me a patient to take care of.
Allow me five minutes to go there．
He looked for some friends（作及物动词短语的宾语）to consult．
He thought of something to do．
He longed for a new world to conquer．
由不定式修饰的名词可以是句子的主语，甚至前面有there be这种结构。
A tiger to fight with the criminal had been selected．
The future to greet us will be prosperous．
The man to come to our assistance is John．
The exercise to be done should be handed in next week．（被动不定式）
There were many stores to supply us with food．（“名词＋不定式”结构前常有there be结构）
There is not anyone to save him．
There is enough money to spare．
There is nothing to do（or to be done）．
There is not a moment to lose（or to be lost）．
There are many plans to make（or to be made）．
There is a lot of work to finish（or to be finished）．
但是：
There is nothing to speak of（不要说to be spoken of）．
He knows all there is to know（不要说to be known）．
There is plenty to eat（不要说to be eaten）．
There is the devil to pay（不要说to be paid）．
This policy leaves much to be desired（不要说to desire）．
There remains nothing to be said（不要说to say）．
不定式修饰的名词间或是系动词be后的补语。
He is not a man to tell lies（=man who will tell lies）．
It is a sight to gladden her heart（=sight that may gladden...）．
I was the last to see him alive．
He is a man to be trusted．
He is not a child to be trifled with．
It is not a place（=suitable place）to visit．
That is the only thing（=suitable thing）to do．
不定式修饰的名词可以是介词with（或without）的宾语。
With some friends to advise him（=If some friends will advise him），he may become a good boy．
With much money to spend（=As he had much money to spend），he became worse and worse．
With all the world to rule（=Though he might rule all the world），he would not be content．
He has a big family，with fifteen children to look after（=and has fifteen children to look after）．
A plan was made，with everyone to contribute 30 dollars．
Men go to war，with women to remain at home．
Without anyone to speak with him，he feels extremely lonesome．
He arrived home，without anyone to greet him．
(3)不定式必须用作同位语，和一个名词（不论表示意图与否）紧密相连或有松散联系，这个名词作它的主体词，如1135节中（8）类句子。
（h）His effort to convince his brother of his folly has failed．
Our project—to build a bridge across the river—is on foot．
I don't understand his interest—to collect all kinds of bottles and glasses．
(4)不定式所修饰名词必须是一个能把不定式变为形容词短语或定语从句的抽象名词，如1135节中（9）类句子。
（i）Our opportunity to win（=of winning，on which to win）the prize is gone．
Is that a good reason to invade（=for invading，for which you should invade）our country?
He has the power to arrest（=of arresting）any lawbreaker.
In this country everyone has a chance to go（=of going）to college．
There's no necessity to tip（=for tipping）the taxi-driver．
This month is the best time to travel（=for travelling）．
This is the only way for us to get（=of our getting）free and independent．
I have the honour to be admitted（=of being admitted）into this club．
The power for science（带意义上的主语）to serve mankind is limitless．
I'm in no mood to attend（=for attending）a concert．
Thousands of us made arrangements to flee the dictatorial government．
Illness is his pretext to avoid（=for avoiding，on which to avoid）the Press．
My opportunity to study engineering is no more．
(5)不定式必须用在“have＋the＋抽象名词”这类习用语后，如1135节中的（10）类句子。
（j）He has the goodness（or the kindness，the confidence，the impudence，the guts，the reason，the good luck）to do it．（=He is good enough，confident enough，etc．）
Has he the heart（=Is he so hard-hearted as）to abandon his wife and children and become a monk?
He has the face（=is impudent enough）to come over to the enemy．
He has the folly to trust a cheat．
c．用在系动词后的不定式
1137 系动词be后的不定式可表示事前的安排或义务。
You are to die at eighty-two．（上天意旨或命运安排）
The human race is to suffer more in the next century．（预言）
One is to struggle for one's living．（环境的安排）
Houses are to protect us from bad weather．
You are to come at seven．（说话人的安排）
（比较：You have to come at seven．）（强迫命令）
Am I to come at seven?（问对方的计划）
Nobody is to say such a thing．（禁令）
Children are not to smoke．
We must be patient if we are to win the war（=if to win the war is our plan）.
If you are to study in Europe，you must learn a foreign language．
He is not to be（=should not be）feared．（被动式）
You are to be congratulated．
Apples are to be（=may be，can be）bought everywhere．
Even a dog is not to be insulted．
The cause is nowhere to be found．
The letter is for you to answer（以letter为意义上的宾语）today．（=You are to answer the letter today．）
The mess is always for me to clear up．
He is to blame（=is to be blamed）．He is something（or much，not a bit）to blame．（主动形式，被动意义）
The house is to let（=is to be let）.
The war is still（or yet）（=remains）to win．
The cause is not far（or not long，yet，still）to see（or find）．
Much（or A great deal，Something，Little）is yet（or still）to do．
还有其他系动词可以用，但它们表示其他东西，而不指事前安排。
Something remains to do．
The problem stands to be solved．
He seems to know it（=it seems that he knows it）.
He seems to hate me．
He appeared to be jobless．（=It appeared that he was jobless．）
The method proves（=is found）to be effective．
My secretary proved to be very helpful．
用在系动词（特别是动词be）后时，起形容词作用的不定式和1117节中所讨论的起名词作用的不定式很相似，但它们的作用不同。
My advice（抽象名词作主语）is for you to apologize（起名词作用的不定式）to her．
To do（起名词作用的不定式作主语）everything is to do（起名词作用的不定式）nothing．
John（具体名词作主语）is to（=should，must）come（形容词作用的不定式）at seven．（事前安排）
This apple（具体名词作主语）is not to（=should not，must not）be eaten（起形容词作用的不定式）.
d．用在宾补动词后的不定式
1138 在“宾补动词＋宾语”结构中，可以说宾语既是宾补动词的宾语，又是不定式意义上的主语。
约有90个表示“判断”的宾补动词可以和不定式to be或to have一起用，但不能和其他不定式（如to do，to go，to see）一起用。
He believed them to be honest．（=He believed that they were honest．）
I judged him to have been a gambler．（=I judged that he had been a gambler．）
I should guess him to be playing a trick on me．（=I should guess that he is playing a trick on me．）
He declared the rumour to be false．
He asserted the diamond to be genuine．
He esteems himself to be lucky．
He is believed to be honest．（宾补动词可用于被动结构）
It is declared to be false．
The rumour was thought to be unfounded．
He believed them to have killed his friend．
I judged him to have seen much of the world．
1139 约有120个表示“指示”或“愿望”的宾补动词可以和任何不定式一起用，但在许多情况下不能正确给出与之相当的从句。
He ordered his men to set out at once．（He ordered that his men should set out at once．）
Nothing could tempt me to do evil．
He likes his wife to dress well．
He asked me to open the door．
He forced me to accept his proposal．
He invited his friend to spend the vacation with him．
They are not allowed to leave．（宾补动词的被动结构）
His children were left to be fooling around．
He was induced to be a vagabond．
He ordered his men to burn the bridge．（=He ordered the bridge to be burnt．）
He caused his students to hand in their exercises．（=He caused the students' exercises to be handed in．）
I don't want there to be another war．
He likes there to be a picnic．
He meant there to be no trouble．
1140 约有20个表示“让”或“感觉（听见、看见等）”的宾补动词可以和不带to的不定式一起用。
