【文章內(nèi)容簡(jiǎn)介】 ad done his best.（否定意味）He need have gone and sent that letter in person.（實(shí)際上沒有做）四、NEED與推測(cè)NEEDN’T表示“不一定”。（本條可參照must/can的用法。）1)NEEDN’T+BEIt needn’t be hot in Florida ：It can’t be hot in Florida now.（一定不）It must be hot in Florida now.（一定）2)NEEDN’T+HAVE DONEHe need not have seen much of the world, though he is an old ：He can’t have seen much of the world, for he is just a little must have seen much of the world, for he has been traveling so 、NEED與問句 1)反意疑問句的構(gòu)成 You needn’t go, need you? 2)答句的構(gòu)成Need he go?Yes, he must/has to/needs , he needn’t.（本條可參照must的用法）六、情態(tài)動(dòng)詞NEED與實(shí)義動(dòng)詞NEED 1)使用范圍作為實(shí)義動(dòng)詞的NEED有人稱、數(shù)和時(shí)態(tài)的變化，使用范圍更為廣泛，不受句子類型和時(shí)態(tài)的限制。在肯定句、過去時(shí)和將來時(shí)的句子中，一般使用作為實(shí)義動(dòng)詞的NEED。He needs to see a doctor straightaway.（此處needs to不能換做need，因?yàn)楸揪涫强隙ň洌￤ill he need to start earlier? 注：NEED TO BE DONE與NEED DOING可以互換，后者更為常用（這里的NEED均為實(shí)義動(dòng)詞）。2)含義差別NEEDN’T HAVE DONE與DIDN’T NEED TO DO表示“不必要”的時(shí)候，在意義上有所差別，前者表示“本不必做??”，實(shí)際上已經(jīng)做了（NEED為情態(tài)動(dòng)詞）；后者單純地表示“不必做??”（NEED為實(shí)義動(dòng)詞）。第四篇：情態(tài)動(dòng)詞教案情態(tài)動(dòng)詞【考綱解讀】情態(tài)動(dòng)詞與虛擬語氣有千絲萬縷的聯(lián)系，它們往往放在一起考查。在近年高考題中，對(duì)情態(tài)動(dòng)詞的考查幾乎每年都有縱觀近幾年的高考題可以看出，高考對(duì)情態(tài)動(dòng)詞的考查熱點(diǎn)依次是：（1）推測(cè)和可能性；（2）“情態(tài)動(dòng)詞+have done”結(jié)構(gòu)表示猜測(cè)或表示虛擬語氣；（3）shall, should, can, must表示特定語氣。尤其是對(duì)“情態(tài)動(dòng)詞+have done”結(jié)構(gòu)的考查頻率較高。試題的情景設(shè)置往往生動(dòng)、真實(shí)，但考查的角度趨于細(xì)微化和綜合化，有效信息較為隱蔽，這就決定了情態(tài)動(dòng)詞題是難題之一。情態(tài)動(dòng)詞題每年都考，所以本專題在高考中的重要地位是顯而易見的。因而在復(fù)習(xí)中應(yīng)引起高度重視，且依筆者之見，來年高考中對(duì)情態(tài)動(dòng)詞考查的可能性依然非常大?！局R(shí)要點(diǎn)】一、情態(tài)動(dòng)詞的語法特征，只表示期待或估計(jì)某事的發(fā)生。 除ought 和have 外，后面只能接不帶to 的不定式。、數(shù)的變化，即情態(tài)動(dòng)詞第三人稱單數(shù)不加s。，即沒有不定式，分詞等形式。二、情態(tài)動(dòng)詞的基本用法 和be able to 1)can could 表示能力；可能(過去時(shí)用could)，只用于現(xiàn)在時(shí)和過去時(shí)(could)。be able to可以用于各種時(shí)態(tài)。They will be able to tell you the news 。2)只用be able to中情況： 位于助動(dòng)詞后； 情態(tài)動(dòng)詞后；表示過去某時(shí)刻動(dòng)作時(shí)； 用于句首表示條件；表示成功地做了某事時(shí)，只能用was/were able to，不能用could。He was able to flee Europe before the war broke out.=He managed to flee Europe before the war broke ，他就逃離歐洲了。注意：could，在否定，疑問句中表示推測(cè)或懷疑。表示提出委婉的請(qǐng)求（注意在回答中不可用could）。—Could I have the television on? —Yes，you can./No，you can’ couldn’t be a bad 。1)表示允許或請(qǐng)求；表示沒有把握的推測(cè)；may 放在句首，表示祝愿。May God bless you!愿上帝保佑你！He might be at 。注意：might 表示推測(cè)時(shí)，不表示時(shí)態(tài)。只是可能性比may 小。2)may/might as well，后面接不帶to 的不定式，意為“不妨，還是……好”。You may(might)as well tell me the 。 to和must1)兩詞都是“必須”的意思，have to 表示客觀的需要，must 表示說話人主觀上的看法，即主觀上的必要。My brother was very ill，so I had to call the doctor in the middle of the ，我只得半夜里把醫(yī)生請(qǐng)來。(客觀上需要做這件事)He said that they must work 。（主觀上要做這件事）2)have to有人稱、數(shù)、時(shí)態(tài)的變化，而must只有一種形式。He had to look after his sister 。3)在否定結(jié)構(gòu)中：don’t have to 表示“不必”（可以不可以都行）；mustn’t表示“禁止” You don’t have to tell him about 。You mustn’t tell him about 。1)must用在肯定句中表示較有把握的推測(cè)，意為“一定”。2)must表對(duì)現(xiàn)在的狀態(tài)或現(xiàn)在正發(fā)生的事情的推測(cè)時(shí)，must 后面通常接系動(dòng)詞be 的原形或行為動(dòng)詞的進(jìn)行式。You have worked hard all must be ，一定累了。（對(duì)現(xiàn)在情況的推測(cè)判斷）He must be working in his 。比較：He must be staying 。He must stay 。3)must 表示對(duì)已發(fā)生的事情的推測(cè)時(shí)，must 要接完成式。I didn’t hear the must have been ，我想必是睡著了。4)must表示對(duì)過去某時(shí)正發(fā)生的事情的推測(cè)，must 后面要接不定式的完成進(jìn)行式?！猈hy didn’t you answer my phone call?—Well，I must have been sleeping，so I didn’t hear )否定推測(cè)用can’t。If Tom didn’t leave here until five o’clock，he can’t be home ，他此時(shí)一定還未到家。can，could，may，might，must 皆可表示推測(cè)，其用法如下： 1)情態(tài)動(dòng)詞+動(dòng)詞原形表示對(duì)現(xiàn)在或?qū)淼那闆r的推測(cè)，此時(shí)動(dòng)詞通常為系動(dòng)詞。I don’t know where she is，she may be in ，她可能在武漢。2)情態(tài)動(dòng)詞+動(dòng)詞現(xiàn)在進(jìn)行時(shí)表示對(duì)現(xiàn)在或?qū)碚谶M(jìn)行的情況進(jìn)行推測(cè)。At this moment，our teacher must be correcting our exam ，我們老師想必在批改試卷。3)情態(tài)動(dòng)詞+動(dòng)詞完成時(shí)表示對(duì)過去情況的推測(cè)。We would have finished this work by the end of next 。The road is must have rained last ，昨天晚上一定下雨了。4)情態(tài)動(dòng)詞+動(dòng)詞的現(xiàn)在完成進(jìn)行時(shí)表示對(duì)過去正在發(fā)生事情的推測(cè)。Your mother must have been looking for 。5)推測(cè)的否定形式，疑問形式用can’t，couldn’t表示。Mike can’t have found his car，for he came to work by bus this ，因?yàn)樵缟纤亲财噥砩习嗟?。注意：could，might表示推測(cè)時(shí)不表示時(shí)態(tài)，其推測(cè)的程度不如can，may。+have+過去分詞1)may(might)have+done (could)have+done ，推測(cè)過去時(shí)間里可能發(fā)生的事情。Philip may(might)have been hurt seriously in the car 。2)must have+done ，語氣較強(qiáng)，具有“肯定”“諒必”的意思?！狶inda has gone to work，but her bicycle is still here.—She must have gone by )ought to have done sth.／should have done ，而事實(shí)上并沒有做。否定句表示“不該做某事而做了”。He ought not to have thrown the old clothes away.（事實(shí)上已扔了。）ought to 在語氣上比should 要強(qiáng)。4)needn’t have done I dressed very warmly for the trip，but I needn’t have done weather was ，我穿的非常暖和，但我本沒有必要那么去做。天太熱了。5)would like to have done I would like to have read the article，but I was very busy ，但我那時(shí)太忙了。 和ought toshould 和ought to 都為“應(yīng)該”的意思，可用于各種人稱?！狾ught he to go?— think he ought ，命令時(shí)，語氣由 should（應(yīng)該），had better最好），must（必須）漸強(qiáng)。 better表示“最好”had better 相當(dāng)于一個(gè)助動(dòng)詞，它只有一種形式，它后面要跟動(dòng)詞原形。had better do had better not do had better have done ，意為“本來最好”。 rather表示“寧愿” would rather do 寧可干某事would rather not do 寧可不干某事 would rather...than...寧愿……而不愿還有would sooner，had rather，had sooner都表示“寧愿”“寧可”的意思。I would rather stay here than go home.=I would stay here rather than go 。1)would like；would like to do=want to 想要，為固定搭配。Would you like to go with me?你想和我一塊兒去嗎？2)Will you...? Would you like...?表示肯定含義的請(qǐng)求勸說時(shí)，疑問句 中一般用some，而不是any。Would you like some cake?要蛋糕嗎？3)否定結(jié)構(gòu)中用will，一般不用would，won’t you是一種委婉語氣。Won’t you sit down?你不坐嗎? must和need相同:Yes,...,...needn39。t/don39。t have to may和can could相同:Yes,...may/can/,...mustn39。t/...39。d better not/can39。:Yes,...can/,...can39。:Yes,...,...shouldn39。:Yes,...do/,...won39。t/1）Could I borrow your dictionary?Yes,of course, , course,表示肯定的語氣,允許某人做某事時(shí),用can和 may來表達(dá),：will 與you連用, 連用,）Shall I tell John about it?No,you 39。ve told him 39。t 39。t 39。t 39。t 39。t 不必,39。t 將不,mustn39。t 禁止、39。t ,不必的意思,應(yīng)用needn39。）Don39。t forget to e to my birthday party don39。t won39。t can39。t haven39。t ,表請(qǐng)求、建議、也可作為實(shí)義動(dòng)詞表“意愿、意志、決心”,本題表示決心,一、need表示“需要”或“必須”，作情態(tài)動(dòng)詞時(shí)，僅用于否定句或疑