He is senior to me by seven years. to go home early.
他比我年長七歲。 The president was so young that he was junior to some of his employees.
總裁的年齡甚至是比他的一些雇員還小。
含不定詞句型 I am glad to ... 結構︰主詞（人）＋be 動詞＋情緒形容詞（如 glad，sorry…）＋不定詞…。
說明︰<不定詞>放在情緒<形容詞>如 glad，sorry，happy，sad，surprised，troubled等字之後修飾，這是<不定詞>做<副詞>的用法。
I am glad to see him. 我很高興看到他。
Sue was troubled to see trash everywhere. 蘇看到到處是垃圾很苦惱。 Sara was excited to see the rock band. 莎拉看到搖滾樂團很興奮。 ... too ... to ...
結構︰主詞＋動詞＋too＋形容詞／副詞＋（for＋sb.）＋to-不定詞… 說明︰此句型意為\太…而（使某人）不能…\。too 為<副詞>，可修飾<副詞>或<形容詞>。too 後也可接含有<形容詞>的單數<名詞>，即\＋<形容詞>＋a＋單數<名詞>＋to-<不定詞>\，也可以是\＋<不可數名詞>＋to…\或\＋複數<名詞>＋to…\。該句型如提到\對某人來說\，則加入\＋人\。該句型表示\否定\的意義，若加上<附加問句>，則須用否定，如例句8。
He walked too slowly to catch up with me. 他走得太慢而不能跟上我。
It is too dark in this room for me to read a book. 房間太暗，使我無法看書。 This problem is too difficult for them to settle. 這對他們來說真是一個難解的問題。
The price is too low for customers to believe. 價格低得令顧客難以相信。 He is too young a boy to do it. 他還太小，無法做這事。
He has too much work on hand to go picnicking with us.
他手頭的工作太多了，不能跟我們去野餐。 He has too many things at his disposal 有太多事要他處理，使他不能早點回家。 The boy is too young to do it, isn't he? 這男孩年紀太輕不能做這件事，不是嗎？ I am too glad not to ...
結構︰主詞＋動詞＋too＋形容詞／副詞＋not＋to-不定詞…
說明︰此句型意為\太…而必能…；非常…\。本<句型>具有雙重否定作用，也可將否定詞移到<動詞>部分。
Our professor is too capable not to solve this difficult problem. 我們教授非常有才幹，必定能解決這一難題。
This customer is too honest not to deceive us. 這位客戶非常誠實，不會騙我們。
I am too glad not to help the boy.我太樂意了而不能不幫助那男孩－－我非常樂意幫助那男孩。
It is never too late to learn. 活到老，學到老。
I am only too ... to ...
結構︰主詞＋動詞＋only too＋形容詞／副詞＋to-不定詞
說明︰此句型意為\非常…\。only 除去了 too 的否定意義，only too 相當於 very，very much 等。
I am only too glad to accept your kind invitation. 我非常高興地接受你的邀請。 He is only too willing to serve friends. 他極願為朋友效勞。
I am only too pleased to do business with you. 我能和你做生意，太高興了。 ADJ/ADV + enough to ...
結構︰主詞＋動詞＋…形容詞／副詞＋enough＋（for sb.）＋to-不定詞
說明︰此句型意為\足以…\。enough 可做<副詞>或<形容詞>用，在此做<副詞>，可修飾<副詞>或<形容詞>，恆置於被修飾的<副詞>或<形容詞>之後。
We need several men strong enough to do the work.
我們需要幾個強壯得足以做這件工作的人。 They bought a house large enough for ten persons to live in. 我們買了一棟房子，大得足以供十個人
住。
He is competent enough to fill that position. 他足以勝任那職位。 He ran fast enough to catch the thief. 他跑得飛快，足以抓住那小偷。
Our teacher is old enough to retire. 的<受詞>，否則就做<介系詞>的<受詞>。how，where，when，why均為<疑問副詞>。<不定詞片語>中的<動詞>若為<及物動詞>，則後面要有<受詞>；若為<不及物動詞>，則不需要<受詞>。
How do I know what to do and what not 我們老師年紀已夠得上退休了。
The assignment is few enough to be finished within half an hour.
作業很少，足能在半小時內完成。 ... enough + N + to do ...
結構︰主詞＋動詞＋enough＋名詞＋to-不定詞
說明︰此句型意為\有足夠的…可以做…\。該句型也可寫作\主詞＋動詞＋名詞＋enough＋to-不定詞\。 enough 在此做<形容詞>，修飾<名詞>，可置於該<名詞>之前或之後。 He has enough money (=money enough) to buy a car. 他有足夠的錢買一輛汽車。 He hasn't enough sense to realize his mistakes. 他沒有足夠的辨別力去認識自己的錯誤。
It is a pity that he doesn't have enough money to sponsor the project. 遺憾的是他沒有足夠的錢來支持這項計劃。
Will 2,000 dozens be enough for selling? 兩千打夠賣嗎？ ... be good enough to ...
結構︰Would you be good enough＋to-不定詞…？
說明︰此句型意為\請你…好嗎？\。本<句型>的意思和\you be so kind as to ...?\一樣， <語氣>較客氣。
Would you be good enough to turn the radio down a bit?請你把收音機的聲音關小一點好嗎？
Would you be good enough to keep silent? 請你保持安靜好嗎？
Would you be good enough to move a bit to the right? 請你往右邊移一點好嗎？ ... how (+ N) + to do ...
結構︰…how／what／when／where／which／whose（＋名詞）＋to-不定詞…
說明︰此句型意為\應該如何做／何時做／何地做／做哪些事…\。what，whom，which 為疑問<名詞>，做其後 <不定詞片語>中<動詞>to do? 我怎麼知道什麼該做，什麼不該做？ He showed me how to use the tape recorder. 他教我如何使用這台卡式錄音機。 What to do is one question, and how to do it is quite another.
應該做什麼和應該怎樣做是完全不同的兩個問題。
The trouble is when to start the business. 麻煩在於應該什麼時候開始這項工作。
We haven't decided where to go for lunch. 我們還沒有決定去哪裡午餐。
I don't know which advise to follow. 不曉得該聽誰的勸告。
I learned what expressions to use in public. 我懂得在公共場所中應使用什麼措辭。
How to begin is more difficult than where to stop. 如何著手遠比在何處結束來得困難。
You should know what to cook to eat. 你應該知道該煮什麼來吃。
The problem is when to get the money we need. 問題是什麼時候能得到我們所需要的錢。
There are so many fancy cars on display here that I don't know which to buy.
有這麼多的豪華汽車在此展出，我不知要買哪一輛才好。 ... only to do ...
結構︰…only／merely／simply／just＋to-不定詞…
說明︰此句型意為\竟然…；卻…\。表示與先前的努力相反的結果，一般用在句尾。
He studied hard only to fail in the exam. 他這麼用功，結果竟然考場失利。 He rushed all the way to the station only to miss the train.
他一路衝往車站，結果還是錯過了火車。 He tried a second time only to fail
again. 他再試一次，竟然還是失敗。 He tried to increase his income by gambling only to plunge more deeply into the mire. 他企圖藉賭博增加收入，卻陷入了更深的困境。 I went out, merely to get caught in a shower. 我跑出去，結果徒然碰到一場驟雨。 ... have only to do ... 結構︰have only＋to-不定詞… 說明︰此句型意為\只需…就夠了\。相當於\...\或\one has to do ...\。 You have only to sit there and watch what I am doing. 你只要坐在這裡，看著我做就行了。 Don't worry; you have only to sing a song to please her. 不用擔心，你只需唱首歌讓她高興就行了。 You have only to go. 你只要去即可。 You have only to ask and he'll tell you. 你只要問他，他就會告訴你。 ... never to do ... 結構︰…never＋to-不定詞… 說明︰此句型意為\不會再有…的結果\。 He went on a journey when he was 18 years old, never to come back. 他十八歲時出外旅行，一直沒有回來。 He went off to the war never to return alive. 他去參加戰爭，沒能活著回來。 She left her husband, never to come back. 她離開了她丈夫，再也沒回來。 make/have sb. do sth. 結構︰主詞＋make／have／bid／let＋受詞（人）＋不定詞原形 說明︰此句型意為\要／囑咐／叫…\。<使役動詞>中，make、have、bid、let 等字加了<受詞>之後，要接原形<動詞>做<受詞補語>，與使用<分詞>相比，<不定詞>原形重點在事實。變成<被動語態>時，該<受詞補語>要變成<不定詞片語>。但是 have 當<使役動詞>時，無<被動語態>。 I made him do it. 我叫他做這事。 I let him do it. 我讓他做這事。 They had/made the girl clean the floor. 他們叫這個女孩打掃地板。 The mother bade the child behave himself. 媽媽叮嚀孩子要守規矩。 He was bidden to finish the work on schedule. 我要他按時完成工作。 My father will probably have Tom paint the house green. 我爸爸很可能叫湯姆把房子漆成綠色。 He had me help him with his homework. 他叫我幫忙他做家庭作業。 ... want/like to do ... 結構︰主詞＋一般及物動詞＋不定詞（to＋V）…。 說明︰常以<不定詞>作為<受詞>的<及物動詞>有：like（喜歡），want（想要），try（設法）， love（喜愛），hate（討厭），forget（忘記），begin（開始），start（開始），need（必須）。 Some students hate to study English. 有些學生不喜歡研讀英語。 You need to study in a quiet place. 你必須在一個安定的地方讀書。 He likes to go to the movie. 他喜歡去看電影。 She wants to help Mary. 她想要幫助瑪麗。 ... want/ask sb. to do ... 結構︰主詞＋want／ask／tell 等＋受詞＋to-不定詞 說明︰<不定詞>放在<受詞>的後面，用於補充說明<受詞>的動作，叫做\受詞補語>\；當<不定詞>要表達\不要做某事\的意思時，則須採用<不定詞>的<否定式>，即直接在<不定詞>前加 not。常用的此類<動詞>有 want，get，compel，expect，ask，would like，advise，urge，wish，tell，allow，permit，trouble，help，teach 等。 I told him not to goof around. 我叫他不要游手好閒。 The teacher urged his students to prepare for the exam. 老師勸他的學生準備考試。 They forced me to do things against my will. 他們強迫我做違背我心意的事。 Do you want me to go there instead of you? 要不要我代你到那兒去？ I got him to do it. 我叫他做這事。 Their help enabled me to finish the
work with ease.他們幫助我，使我能夠順利地完成工作。
A sense of humor enabled him to get along well with others.
幽默感使他能與人相處愉快。 The heavy workload forced me to cancel the camping trip.繁重的工作量迫使我取消去露營。
The father allowed (=permitted) his son to travel abroad alone.
父親答應讓他的兒子單獨出國旅行。 We troubled him to turn on the light. 我們麻煩他打開電燈。
We needed someone to fix the tape recorder. 我們需要有人來修理錄音機。 I heard him sing.
結構︰主詞＋hear／see／feel＋受詞＋原形不定詞
說明︰此句型意為\聽／看／感覺…\。英文中表示\看\，\聽\，\感覺\的三類<動詞>，加了<受詞>之後，須接原形<動詞>做<受詞補語>，用以表示已發生，而且是主動意味的事實。我們稱此類<動詞>為知覺<動詞>，常用的有 see，watch，notice，look at，hear，listen to，feel 等。變成<被動語態>時，<受詞補語>要變成<不定詞片語>，如例句4。這些詞後也可接現在<分詞>，強調\動作進行\，而接原形<動詞>，則強調\整個事實\。
Did you notice anyone come in? 你注意到有人進來過嗎？ As far as I remember, I have never seen him smile. 在我記憶中，我從未見他笑過。 She once heard him whisper to another girl. 她曾聽到他對另外一個女孩說悄悄話。
He was heard to sing. 我聽到他唱歌。 I felt my heart beat violently. 我感覺到自己的心跳得很厲害。
She liked to listen to children talk. 她喜歡聽孩子們談話。
We heard him playing with his puppy. 我們聽到了他在玩著他的小狗。 Rick often watched the boats
returning to port in the late afternoon. 瑞克常常看到小船在傍晚正回到港口。 be going to ...
結構︰主詞＋be going＋to-不定詞… 說明︰此句型意為\將做…\。\＋to-<不定詞>\用作表示未來的<助動詞>，表示最近之未來將做的行為或未來的意圖。這種<句型>經常用於會話體，表示包含講話者的主觀或感情的情形。
He is going to marry Jane in May. 他打算五月和珍結婚。
I am going to stay up late to finish my paper. 為了完成報告我打算熬夜不睡。
I'm afraid he is going to lose the match. 我恐怕他會輸掉比賽。 The train was just going to start when we arrived. 我們到達時，火車馬上就要開了。
My father was a sailor and I'm going to be one, too.
我父親（以前）是水手，我也打算當水手。 be about to ...
結構︰主詞＋be about＋to-不定詞… 說明︰此句型意為\將做…\。表示極近的未來之行為，故為了表示幾乎等於現在的未來而不和未來之 <副詞>一起使用，如：不能說\am about to go next week.\。 He was surely about to change his mind. 他一定會改變主意。
She was about to walk out of the door when the telephone rang. 電話鈴響時她正要出門。
Something unusual was about to happen. 某種不尋常的事正要發生。 ... be to ...
結構︰主詞＋be＋to-不定詞…
說明︰此句型意為\預定要…\。\＋to＋<不定詞>\含有事先的安排或命令，表示\必須…；應該…；打算…\。
A was to be placed onto A', and B onto B'.
... seem/appear to ...
結構︰主詞＋seem／appear＋to-不定詞… 說明︰此句型意為\似乎是…，好像…\。to-<不定詞>的內容是表示狀態的詞。seem 有時要加入\或許\（probably）的意思翻譯起來才適當；appear 近於\乍看之下好像是…\的意思。 Taiwan seems to contain no petroleum. 台灣恐怕沒有蘊藏石油吧！
The thread seems to match the cloth.
這線和這布似乎很相稱。
He appears to be very tired. 他似乎很累。
These stars appear to move around the North Star. 這些星星似乎環繞著北極星轉。
They appear to be able to handle the problem. 他們似乎可以處理這個問題。
John seems to love music very much. 他假裝在爬山。
She pretended not to go. 她假裝不去。 He pretended to be a good man. 他假裝是好人。
Let's pretend (that) we are pirates. 讓我們玩假裝海盜的遊戲吧！ ... stop to ...
結構︰主詞＋stop＋to-不定詞…
說明︰此句型意為\停下來…\。若\＋約翰似乎很喜歡音樂。 To ..., Main Clause
結構︰不定詞片語，主要子句
說明︰此類<不定詞片語>通常放在句首，表示目的，修飾<主要子句>。常用的有 to tell the truth（老實說），to do someone justice（替某人說句公道話），to be brief（簡言之），to begin with（首先），to sum up（總之），to make matters worse（更糟的是），so to speak（可以這麼說），needless to say（不用說），to say nothing of sth。（更不用說）等。
To make sure that he was at home, I called him up in advance.
為了確定他在家，我事先打電話給他。
To tell the truth, I don't agree to your plan. 老實講，我不同意你的計劃。 To do her justice, she is not as bad as you described. 說句公道話，她並沒有你說的那樣壞。 To sum up, only when strict punishment can be imposed on the lawless, can social stability be maintained. 總之，唯有當嚴刑峻罰加之於違法之徒時，才能維持社會安定。
Mary is, so to speak, a hardworking student. 瑪麗可說是個用功的學生。 I can't speak English, to say nothing of Chinese. 我不會說英語，更別提中文了。 Needless to say, learning without thinking is useless. 不用說，學而不思則罔。
... pretend to ...
結構︰主詞＋pretend＋to-不定詞／that-子句
說明︰此句型意為\假裝…\。pretend 後面用 to-不定詞或 that 子句。 He was pretending to climb a mountain. Ving\是\停止…\。
They just don't stop to think. 他們就是不停下來想一想。
They stopped to look into the window. 他們停下來看看櫥窗。 I have stopped smoking for half a year. 我已經半年不抽煙了。 ... be meant to ...
結構︰主詞＋be meant＋to-不定詞
說明︰此句型意為\…是有意要…；…是命中注定要…\。\有時變成\meant for N\。
Some TV programs are meant to be watched today and forgotten tomorrow. 有些電視節目的用意是要今天觀賞，明天忘掉。
He believes he is meant to be a great man. 他相信他命中要成為偉人。
This dictionary is meant for you. 這本字典是要給你的。 be + ADJ + to ...
結構︰主詞＋be＋形容詞＋to-不定詞 說明︰<主詞>實際上是 to-<不定詞>的<受詞>，經過轉變而移到句首。
It was even more pleasing to look at in the morning light.
它在早晨的光線下看起來更悅目。 The rising sun is especially
beautiful to look at from this angle.旭日從這個角度看起來特別美。
I think she is easy to please. 我想她是很容易討好的。 ... be likely to ...
結構︰主詞＋be likely＋to-不定詞… 說明︰此句型意為\…可能…\。likely 表示具有充分根據的預測。有時<句型>可變為\is likely that ...\。 One's first impression is likely to be