1、表示運(yùn)動(dòng)、行動(dòng)或說明運(yùn)動(dòng)的朝向情況。

它可指達(dá)到或想達(dá)到的人、地、物。也可指沒有達(dá)到或者沒有完全達(dá)到的人、地、物。

1）動(dòng)作本身有方向性，因而與“to”后所接的地點(diǎn)、人、物構(gòu)成指向與被指向的關(guān)系。如：drive to the cIty(開車到城市去)Low to an acquaintance(向認(rèn)識(shí)的人點(diǎn)頭)run to his mother(跑到他母親那里去)2）雖然to前是名詞但該名詞也含有方向性。如：on the why to the station(在去車站的路上)a trip to the moon(到月球旅行)3）動(dòng)詞雖然無方向性，但此動(dòng)作與“to”后面的目的也構(gòu)成“朝向”關(guān)系。如：ware a new hat to the party(戴新帽子去參加聚會(huì))4）Be+(adj)+to表示主語的去向如：A boat is to the dock now(船現(xiàn)在到碼頭了)2、表示臨時(shí)停的地或物如：He has been to his uncle's house once.(到他叔叔家去過一次)3、表示方向事物所處的位置如：The shed is to the side of the house.(小棚屋在房子的一側(cè))a tendency to sillness(一種傻頭傻腦的趨勢)4、表示接觸或鄰近，相當(dāng)于on、upon、against，但較他們更生動(dòng)，含有某種動(dòng)態(tài)。如：His mother standing with her hands to her eyes.(...用手蒙在眼上)在這種用法中，有時(shí)“to”前后的詞一致，此時(shí)詞前后無需冠詞，表示動(dòng)作進(jìn)行時(shí)的狀態(tài)。

5、表示范圍所能達(dá)到的。

1）用在本身具有伸展性或有回旋余地的動(dòng)詞后如：The garden extend to the river bank(花園延到河邊)2）用在具有漫長擴(kuò)張性的形容詞之后如：wet/drench to the skin(渾身濕透)to作介詞時(shí)的用法：如果這個(gè)帶to 的短語后可以跟名詞， 那么to就是介詞。listen to music： to就是介詞，但是listen to 不跟動(dòng)詞。be used to 習(xí)慣于 ：可以跟be used to the life 習(xí)慣于生活，生活是名詞。to是介詞。所以be used to 后面動(dòng)詞的話，就跟動(dòng)名詞doing而 be happy to do 后面只會(huì)跟動(dòng)詞，不會(huì)跟名詞。 to是不定式。to是介詞， 要跟名詞或doing的短語有：be/get used to習(xí)慣于make a contribution to 為...做貢獻(xiàn)look forward to 期盼 hold on to 堅(jiān)持to的用法:一：表示相對(duì)，針對(duì)be strange (common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable) toAir is indispensable to life.Aircrafts are vulnerable to interference caused by radiation.This injection will make you immune to infection.二：表示對(duì)比，比較1：以-ior結(jié)尾的形容詞，后接介詞to表示比較，如：superior ,inferior,prior,senior,juniorThe quarrel happened prior to my arrival.2: 一些本身就含有比較或比擬意思的形容詞，如equal，similar，equivalent，analogousA is similar to B in many ways.3：表示一些先后順序的形容詞。

4: to也偶爾出現(xiàn)在個(gè)別動(dòng)詞之后,與動(dòng)詞形成固定詞組,表示比較,如:prefer to,compare to,in contrast tocompare to sth.表示比喻或比擬,而compare with sth.表示比較,如:World is usually compared to a stageCompared with his past,he has changed a lot.Prefer的正確句型是:prefer A to B或prefer doing A to doing B,但當(dāng)prefer后接動(dòng)詞不定式時(shí),表示比較的介 詞to就要改成rather than ,如:The undaunted soldier preferred death to surrender.Many people prefer spending money to earning money.They prefer to pursue careers rather than remain home as housewives.5: to與及個(gè)別的名詞構(gòu)成比較之意,如:alternativeGoing to an under water concert is a great alternative to going to dinner.三: 表示修飾關(guān)系1: 表示回復(fù),反應(yīng)意思的詞,如:answer to question,solution to problem,response to inquiry,reaction to proposal,reply to letter2: 表示建筑構(gòu)件的詞匯,如:entry,entrance,approach,access,passage,exit,vent,paththe approach to a bridge引橋the approach to scienceHalf of the population was estimated to have no accessto the health service.The accessto education 接受教育的機(jī)會(huì)The access to medical care 享受公費(fèi)醫(yī)療的權(quán)利3: 表示人物職位和官銜的詞,如:assistant to manager, ambassador to Spain, successor to tradition, heir tothrone,deputy to the National People’s Congressadvisorto the Prime Minister4: 表示權(quán)利和許可的詞匯,如:right,admissionThe employee finally got the admission to the boardroom.Everyone has an equal right to ……..5: 表示柵欄或障礙的詞匯,如:bars to development,the barrier to progress6: 表示與書籍,文本相關(guān)的詞,如:introduction to passage.7: 表示恭喜或是祝賀,如:The director proposed a toastto the health of the guests.Let’s drink to Dick’s success in business8: 另外還有一些名詞符合這種用法,有的具有兩者息息相關(guān),缺一不可的含義.如:key to door,invitation to party, guide to action,limitation to life,accessory to school四: to還具有依據(jù),伴隨,和著節(jié)奏的含義,如:sing to piano, chance to the tune, stamp to the rhythm of the song, add salt to taste（一）：表示相關(guān)聯(lián)，相連接，如：be related to,be relative to,in relation to,be relevant to,link toInvestigate all the facts related to the problem.People often linked walth to happiness.（二）：表示反對(duì)和贊同。

1：to引導(dǎo)的表示反對(duì)，抗拒，對(duì)抗意義的詞組。Be opposed to,be oppsist to,be contrary to,be adverse to,beresistant to,be contradictory to,object to,oppose to,deny tp,be aline toThese buildings are resistant to earthquake.They are to tally opposed to any changes being made in the plans.2: to引導(dǎo)的表示同意，贊同意義的詞組：consent to,subseribe to,The employer consented to give him a salary raise.表示調(diào)整，使符合，使適應(yīng)的含義，如：adapt to,commodate to, adjust to,conform to,habituate to,fit to,suitto,correspond to,cater toShe tried to habituate herself to the styleof plain living.Your action should conform to the interests of the people.They offered various foods to cater to the need of customers.His words doesn’t fit to his actions.Suit your writing styleto the masses.3: 表示投降,屈服,服從的含義,如:be subject to,be subordinate to,submit to,subject to,surrender to,give in to,confess to,admit to.The minority is subordinate to the majority少數(shù)服從多數(shù)Countries nearby oceans are always subject to earthquake.He confessed to having robbed the woman of her wallet.We’re not the kind of people to yield to any military threat.五: 表示趨勢或傾向,如:tend to,be prone to,be inclined to,be apt to,be liable toHe’s liable to seasickness.You are liable to come to wrong conclusion.六: 表示對(duì)事情的堅(jiān)持與執(zhí)著,如:sick to,hold o,adhere to,cling toHe still holds on to his original views.七: 表示約束,局限,如:limit to,confine to,resrict toHe’s confined to the houseby illness.He confined his remarks to scientific mangement.八: 表示一種習(xí)慣或是一種適應(yīng)性,如:get (be) to,used to,be accustomed toFinally,the students got used to my teaching method.九: 表示起因和原由,如:owing to,due to,thanks to,attribute to,come down toThe flight was cancelled due to the thick fog.The famous artist attributed his success to his wife.十: 表示目的或結(jié)果,如:aim to,lead to,give rise toI aim to be an excellent college teacher.His conceit lead to his failure.These bad condition has given rise to a lot of crises十一: 表示命運(yùn),注定,如:be doomed to,be destined to,All military adventures by the two super powersare doomed to fail.十二: 表示數(shù)量上的積累或增加,如:in addition to,add to,amount toIn addition to relief supplies,he also presented with some money.The annual output of steel amounts to 1200 tons.十三: 表示全身心投入的含義,如:be addicted to,contribute to,devote to,commit to十四: 表示展望或是回顧,如:look forward to 盼望，展望）/date back to （回顧）The church dates back to the 13th century.十五: 表示方位概念.如:close to,next toI don’t like wool next to my skin.十六: 表示依靠或借助,如:resort to,turn to,appeal to,He usually appeals to arms to settle the territory dispute.十七: 表示有關(guān)注,關(guān)于: as to,with regard to十八: 表示關(guān)注或重視,如:pay attention to,attach to,We should attach primary importance to job training.十九: 表示依據(jù)或是根據(jù),如:according to,in proportion toAccording to today’s newspaper,the match will be postponed.The lending countries subscribe towards capital stock in proportion to heir economic importance.二十: 表示應(yīng)該或必須含義的句式, 如:It’s time to get up.We are supposed to get here at seven.It’s up to this country to ban nuclear weapons.常用詞組：respond to（反應(yīng)）,appeal to（吸引）,catch on to（理解）,listento （收聽）,used to（過去常常）,give birth to,attend to（照料）,see to（負(fù)責(zé)）,be entitled to（有權(quán)）,belong to（屬于）,come to（蘇醒）,stand up to（勇敢面對(duì)）,help oneself to（請自便）,refer to,to the point（切題）,Train them to stand up to any severe test in hard.The ticket entitled you to a free meal in the luxury hotel.See to it that the children get a hot meal after their swim.You will catch on to the job shortly after wards.People usually refer to television for up-to-the-minute news.△英語介詞to的用法：

①向，朝，往，對(duì)著（某方向或某處）：I walked to the office.我朝辦公室走去。

②位于…方向 ：There are mountains to the north.北面有山。

③到，達(dá)（某處）：Her hair fell to her waist.她的長發(fā)一直垂到腰部。

④到，達(dá)（某種狀態(tài)）He tore the letter to pieces.他把信撕碎了。

⑤（表示范圍或一段時(shí)間的結(jié)尾或界限）到，至We only work from Monday to Friday.我們僅從星期一工作到星期五。

⑥在…開始之前；離；差How long is it to lunch 離吃午飯還有多久？△to作為介詞使用的固定短語有：pay attention to doing sth.關(guān)注做某事look forward to doing sth.盼望做某事admit to doing sth.承認(rèn)做了某事apply to doing sth.適用于做某事object to doing sth.反對(duì)做某事stick to doing sth.堅(jiān)持做某事take to doing sth.喜歡上做某事,逐漸習(xí)慣做某事apply oneself to doing sth.專心致力于做某事devote oneself to doing sth.獻(xiàn)身于做某事