…… enough + N + to do ……
結(jié)構(gòu)︰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>，可置于該<名詞>之前或之后。
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(rèn)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(jié)構(gòu)︰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“Would 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(jī)的聲音關(guān)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(jié)構(gòu)︰…h(huán)ow／what／when／where／which／whose（＋名詞）＋to-不定詞…
說明︰此句型意為“應(yīng)該如何做／何時做／何地做／做哪些事…”。what，whom，which 為疑問<名詞>，做其后 <不定詞詞組>中<動詞>的<受詞>，否則就做<介系詞>的<受詞>.how，where，when，why均為<疑問副詞>.<不定詞詞組>中的<動詞>若為<及物動詞>，則后面要有<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 to do？ 我怎么知道什么該做，什么不該做？
He showed me how to use the tape recorder. 他教我如何使用這臺卡式錄音機(jī)。
What to do is one question， and how to do it is quite another.
應(yīng)該做什么和應(yīng)該怎樣做是完全不同的兩個問題。
The trouble is when to start the business. 麻煩在于應(yīng)該什么時候開始這項工作。
We haven't decided where to go for lunch. 我們還沒有決定去哪里午餐。
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(yīng)使用什么措辭。
How to begin is more difficult than where to stop. 如何著手遠(yuǎn)比在何處結(jié)束來得困難。
You should know what to cook to eat. 你應(yīng)該知道該煮什么來吃。
The problem is when to get the money we need. 問題是什么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.
有這么多的豪華汽車在此展出，我不知要買哪一輛才好。
…… only to do ……
結(jié)構(gòu)︰…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(jié)果，一般用在句尾。
He studied hard only to fail in the exam. 他這么用功，結(jié)果竟然考場失利。
He rushed all the way to the station only to miss the train.
他一路沖往車站，結(jié)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(jié)果徒然碰到一場驟雨。
…… have only to do ……
結(jié)構(gòu)︰have only＋to-不定詞…
說明︰此句型意為“只需…就夠了”。相當(dāng)于“All one has to do ……”或“What one has to do ……”。
You have only to sit there and watch what I am doing. 你只要坐在這里，看著我做就行了。
Don't worry； you have only to sing a song to please her.
不用擔(dān)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(jié)構(gòu)︰…never＋to-不定詞…
說明︰此句型意為“不會再有…的結(jié)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(zhàn)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(jié)構(gòu)︰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>之后，要接原形<動詞>做<受詞補(bǔ)語>，與使用<分詞>相比，<不定詞>原形重點在事實。變成<被動語態(tài)>時，該<受詞補(bǔ)語>要變成<不定詞詞組>.但是 have 當(dāng)<使役動詞>時，無<被動語態(tài)>.
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(guī)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?guī)兔λ黾彝プ鳂I(yè)。
結(jié)構(gòu)︰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>，可置于該<名詞>之前或之后。
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(rèn)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(jié)構(gòu)︰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“Would 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(jī)的聲音關(guān)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(jié)構(gòu)︰…h(huán)ow／what／when／where／which／whose（＋名詞）＋to-不定詞…
說明︰此句型意為“應(yīng)該如何做／何時做／何地做／做哪些事…”。what，whom，which 為疑問<名詞>，做其后 <不定詞詞組>中<動詞>的<受詞>，否則就做<介系詞>的<受詞>.how，where，when，why均為<疑問副詞>.<不定詞詞組>中的<動詞>若為<及物動詞>，則后面要有<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 to do？ 我怎么知道什么該做，什么不該做？
He showed me how to use the tape recorder. 他教我如何使用這臺卡式錄音機(jī)。
What to do is one question， and how to do it is quite another.
應(yīng)該做什么和應(yīng)該怎樣做是完全不同的兩個問題。
The trouble is when to start the business. 麻煩在于應(yīng)該什么時候開始這項工作。
We haven't decided where to go for lunch. 我們還沒有決定去哪里午餐。
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(yīng)使用什么措辭。
How to begin is more difficult than where to stop. 如何著手遠(yuǎn)比在何處結(jié)束來得困難。
You should know what to cook to eat. 你應(yīng)該知道該煮什么來吃。
The problem is when to get the money we need. 問題是什么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.
有這么多的豪華汽車在此展出，我不知要買哪一輛才好。
…… only to do ……
結(jié)構(gòu)︰…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(jié)果，一般用在句尾。
He studied hard only to fail in the exam. 他這么用功，結(jié)果竟然考場失利。
He rushed all the way to the station only to miss the train.
他一路沖往車站，結(jié)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(jié)果徒然碰到一場驟雨。
…… have only to do ……
結(jié)構(gòu)︰have only＋to-不定詞…
說明︰此句型意為“只需…就夠了”。相當(dāng)于“All one has to do ……”或“What one has to do ……”。
You have only to sit there and watch what I am doing. 你只要坐在這里，看著我做就行了。
Don't worry； you have only to sing a song to please her.
不用擔(dān)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(jié)構(gòu)︰…never＋to-不定詞…
說明︰此句型意為“不會再有…的結(jié)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(zhàn)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(jié)構(gòu)︰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>之后，要接原形<動詞>做<受詞補(bǔ)語>，與使用<分詞>相比，<不定詞>原形重點在事實。變成<被動語態(tài)>時，該<受詞補(bǔ)語>要變成<不定詞詞組>.但是 have 當(dāng)<使役動詞>時，無<被動語態(tài)>.
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(guī)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?guī)兔λ黾彝プ鳂I(yè)。