【正文】 but for...要不是……。合肥二模)—Did you make it at last?— for your help，it________a serious loss.A．would cause B．must have causedC．would have caused D．may cause解析：　考查虛擬語氣。wish 后的賓語從句用虛擬語氣，此處表示與過去事實(shí)相反，意思是：我希望我(過去)更努力地學(xué)習(xí)英語了。答案：　B19．(2010福建龍巖檢測)—I didn’t attend the lecture yesterday.—I________，either，if my mother hadn’t reminded me.A．wouldn’t B．wouldn’t haveC．didn’t D．hadn’t解析：　考查虛擬語氣。從句用了與過去相反的虛擬語氣，但主句與現(xiàn)在情況相反，故選A項(xiàng)。答案：　D17．(2011句意為：如果有人給我打電話，就告訴他我很忙。答案：　D16．(2011這里考查的是對(duì)過去情況的假設(shè)，從句用had done，主句用would/could/might have done。答案：　D15．(2011答句句意：如果你整個(gè)假期能夠幫助洗盤子的話，就會(huì)得到一個(gè)MP5作為回報(bào)。答案：　B15．(2011——他一定已經(jīng)啟程了，他是一個(gè)守信的人。吉林長春畢業(yè)班第一次調(diào)研)—Has Tim started？He said he would join in the party.— is a man of his word.A．could have left B．must have leftC．can’t e D．won’t be ing解析：　根據(jù)He is a man of his ，因此推測他肯定已經(jīng)啟程了。must have done表示“過去一定做了……”(非常確定)；can have done 用在否定句和疑問句中，should have done 表示“過去本該做……(實(shí)際卻沒做)”。浙江溫州十校聯(lián)合體模擬)—Where is Lucy?—I can’t say where she is，but she________have gone to meet her classmates，for they want to go to Sichuan to work as volunteers.A．can B．shouldC．must D．may解析：　這里表示對(duì)過去狀況的推斷，用“情態(tài)動(dòng)詞＋have done”。這里選B項(xiàng)表示允諾。答案：　C12．(2011黑龍江哈爾濱質(zhì)檢)Don’t play with the dog，Jack，for it________be dangerous at times.A．shall B．shouldC．can D．must解析：　句意為：杰克，不要逗狗玩，因?yàn)楣酚袝r(shí)可能是危險(xiǎn)的。安徽皖南八校第二次聯(lián)考)—When shall we meet your cousin at the station?—His plane took off 2 hours ago，and it________reach at 5 pm.A．should B．couldC．must D．can解析：　should 的意思是“應(yīng)該會(huì)，可能”，在這里表示對(duì)將來的推測，預(yù)期會(huì)……?！娴膯?？她一定很努力了。浙江嘉興摸底)—Mary’s score on the test is the highest in her class.—Really？She ________have studied very hard.A．may B．ought toC．must D．should解析：　may have done可能已經(jīng)……；ought to have done 本應(yīng)該……；must have done一定曾……，一定已經(jīng)……；should have done 本應(yīng)該……。dressed lady was caught stealing in the fashion enough，she ________have done such a thing.A．would B．mustC．should D．might解析：　根據(jù)題干中的Strangely enough 可知，這里應(yīng)該用should，表示驚訝，可譯為“竟然”。答案：　D8．(2011句意為：盡管合肥十一月的時(shí)候常常很暖和，但有時(shí)候可能會(huì)很冷。合肥第二次教學(xué)檢測)It ________be really cold in Novermber in Hefei though we usually have warm and sunny days.A．should B．willC．must D．can解析：　考查情態(tài)動(dòng)詞。此處否定發(fā)生了轉(zhuǎn)移。但我現(xiàn)在認(rèn)為當(dāng)時(shí)我不應(yīng)該這樣做。濟(jì)寧市第一次聯(lián)考)—Did you punish him for losing your digital camera?—Yes，but I don’t think I________.A．should do that B．need to have done soC．ought have done that D．should have done so解析：　考查情態(tài)動(dòng)詞的用法。——哦，真的嗎？那題目一定不難。對(duì)過去進(jìn)行推測，表示“一定不”應(yīng)使用can’t have done。答案：　A5．(2011句意為：由于不必去商店或者擁擠的購物中心，網(wǎng)上購物能夠節(jié)省大量時(shí)間。答案：　C4．(2011couldn’t have stayed up不可能熬夜；needn’t have stayed up本沒有必要熬夜。杭州市教學(xué)檢測)—Mum，I am feeling tired and sleepy now.—You________so late last night.A．couldn’t have stayed upB．mustn’t have stayed upC．shouldn’t have stayed upD．needn’t have stayed up解析：　考查情態(tài)動(dòng)詞。青島市模擬)—May I tell this to my close friend?—No， let anybody else know about it.A．needn’t B．shouldn’tC．mustn’t D．can’t解析：　由“決不可以讓其他任何人知道”可知選C，mustn’t 表示“不允許，不可以”，語氣強(qiáng)烈。might have done 表示對(duì)過去一種不太肯定的推測。濰坊第一次模擬)—Why didn’t Alex attend the party yesterday evening?—He________not have wanted to see me.A．should B．mightC．could D．would解析：　考查情態(tài)動(dòng)詞。t 【解析】 A　shouldn39。t C．couldn39。ll give me horrible dreams. A．shouldn39。30．[2010ve got an appointment with Miss Smith in the Personnel Department. —Ah，good morning. You ________be Mrs. Peters. A．might B．must C．would D．can 【解析】 B　本題考查情態(tài)動(dòng)詞。29．[2010由句意“這里是緊急出口”，可知此處不允許停車，所以用mustn39。t D．mustn39。t B．needn39。重慶卷] You ________ park here! It39。t have done 本沒有必要做某事，實(shí)際上做了。t D．couldn39。t B．wouldn39。27．[2010句意為：教師們建議：為了孩子們的安全，父母不應(yīng)讓12歲以下的孩子騎自行車去學(xué)校。t allow D．couldn39。26．[2010can39。t B．needn39。25．[2010d rather he ________ more on its culture. A．focus B．focused C．would focus D．had focused 【解析】 B　本題考查虛擬語氣。24．[2010t worry. You ________have it by Friday. A．could B．shall C．must D．may【解析】 B　本題考查情態(tài)動(dòng)詞。t got the reference book yet，but I39。要我一再重復(fù)嗎？must在此用于加強(qiáng)語氣，意為“必須……嗎？非得……嗎？”23．[2010江西卷] I have told you the truth. ________ I keep repeating it? A．Must B．Can C．May D．Will 【解析】 A　考查情態(tài)動(dòng)詞的用法。t。t 【解析】 D　本題考查情態(tài)動(dòng)詞的用法。t C．needn39。陜西卷] —May I take this book out of the reading room? —No，you________. You read it in here. A．mightn39。句意為：你沒有必要買禮物，但如果你想買的話，你也可以買。don39。t C．have to D．don39。20．[2010根據(jù)Had I known提示，可知此句是虛擬語氣，且與過去事實(shí)相反，故主句謂語用would have done的形式。19．[2010根據(jù)many years ago可知，是對(duì)過去事情的推測。willed man. A．would be B．would have been C．must be D．must have been 【解析】 D　考查情態(tài)動(dòng)詞。18．[2010m afraid not. A．Will B．May C．Must D．Need 【解析】 B　考查情態(tài)動(dòng)詞詞義辨析。17．[2010答句句意為：她本可以坐9點(diǎn)的火車去的，坐火車舒服得多，安全得多。s much more fortable and safer to travel by train. A．could have taken B．should take C．must have taken D．can take 【解析】 A　考查情態(tài)動(dòng)詞的用法。句意為：我們本來能在午餐時(shí)到達(dá)，但我們?cè)跈C(jī)場被延誤了