【文章內(nèi)容簡介】 d/might +do。，從句謂語動(dòng)詞用過去完成時(shí)，主句謂語動(dòng)詞用should/would/could/might+have done。，從句謂語動(dòng)詞用should+動(dòng)詞/did/were to do，主句謂語動(dòng)詞用should/would/could/might +do。21． If I ____Alice, I _____them the truth.A. was , would tell B. were ,would tell C. am, will tell D．is , will tell【答案】B【解析】試題分析：本題的含義是如果我是你，我將告訴他們真相，本題if引導(dǎo)的是一個(gè)虛擬的條件句，在虛擬句中，be用were，主句通常用過去的一種，will應(yīng)該用would，故本題選B?？键c(diǎn)：if引導(dǎo)的虛擬條件句。點(diǎn)評(píng)：在英文中條件句有兩種，一種是真實(shí)的條件句，if后遇到將來時(shí)用一般現(xiàn)在時(shí)，一種是虛擬的條件句，if后用過去時(shí)，be用were，在英文的實(shí)際使用中應(yīng)該注意它們的區(qū)別。22． If I_______ one million dollars, I would give it to medical research. If I _______ you, I would give it to charity.A．will have, am B．would have, was C．had, were D．have, is【答案】C【解析】考察虛擬語氣。第一空，虛擬語氣，與現(xiàn)在相反，用過去時(shí)。第二空，虛擬語氣，與現(xiàn)在相反，用過去時(shí)，be動(dòng)詞用were。故選C23．The workers insisted that they a free lunch every noon and the boss hadto do that.A．be given B．being given C．will be to give D．were given【答案】A【解析】句意：工人們堅(jiān)持要求他們每天中午都有免費(fèi)的午餐，老板必須這樣做?？疾樘摂M語氣。insist堅(jiān)持，要求，其后面的賓語從句要用虛擬語氣，跟虛擬式動(dòng)詞原形 或者“should + 動(dòng)詞原形” 。結(jié)合句意和語境可知選A。 24．If I not so busy ,I with you .A．was , would go B．were , would goC．was , should go D．were , will go【答案】B【解析】句意“如果我不忙，我就跟你去”。本題考查對(duì)將來的虛擬語氣。即“if+過去時(shí)，主語+should/would/could/might do”結(jié)構(gòu)。故選B。點(diǎn)睛：虛擬情況從句主句對(duì)現(xiàn)在的虛擬過去式（be一般用were）should/would/could/might+do對(duì)過去的虛擬had+過去分詞should/would/could/might+have done對(duì)將來的虛擬過去式（be一般用were）should/would/could/might+doshould+動(dòng)詞原形were+to do25． If my mother ___ I get a grade of 50 in English exam, she would be angry.A．knows　 　 B．knew　　　 C．has known　　　　D．would know【答案】B【解析】試題分析：句意：如果我的母親知道我英語考試成績是50分，她會(huì)生氣的。表示與現(xiàn)在事實(shí)相反的事實(shí)，該用一般過去時(shí)態(tài)，所以選B。考點(diǎn)：考查虛擬語氣。26． If it had been possible, I would have helped him, but I ______ too busy.A．had been 　 B．would be 　 C．were 　 D．was【答案】D【解析】試題分析：句意：如果可能的話，我肯定會(huì)幫助你的，但是我太忙了。對(duì)過去的虛擬If+主語+had +動(dòng)詞過去分詞,主語+would / should / might / could have + 動(dòng)詞過去分詞。所以描述的是過去的事情，故我過去很忙應(yīng)該用過去時(shí)?？键c(diǎn)：考查虛擬語氣及時(shí)態(tài)的用法。27．— Come and join us, Betty!— I’m afraid I can’t. I’m too busy now. If I ______ time, I would certainly go.A．have B．have hadC．will have D．had【答案】D【解析】試題分析：句意：貝蒂，來加入我們吧！恐怕我不能。我現(xiàn)在太忙。如果我有時(shí)間，我當(dāng)然會(huì)去了。分析：考查if引導(dǎo)的虛擬語氣。表示與過去事實(shí)相反的虛擬條件句。其句子結(jié)構(gòu)為：從句：If + 主語+ had +過去完成式動(dòng)詞+ ……主句：主語+ would （should, could, might） + have +過去完成式動(dòng)詞+……故選 D考點(diǎn)：考查虛擬語氣的用法。28．If I a bird, I _ fly in the blue sky.A．was。 would B．a(chǎn)m。 will C．will be。 will D．were。 would【答案】D【解析】試題分析：句意:如果我是一只鳥，我就能在藍(lán)色的天空中飛翔。根據(jù)句意可知，這里表示的是跟事實(shí)不符的情況，是不可能實(shí)現(xiàn)的事情，因此這里應(yīng)該用虛擬語氣。在if從句中用一般過去時(shí)，主句中用would+動(dòng)詞的原形。故選D?？键c(diǎn)：考查虛擬語氣。29．—I like drinking wine. But people who drink wine aren’t allowed to drive.—If I you, I would give up wine.A．were。 drinking B．a(chǎn)m。 drinkingC．were。 drink D．was。to drink【答案】A【解析】考查虛擬語氣和非謂語動(dòng)詞的用法。根據(jù)句意可知，該句使用了虛擬語氣，if引導(dǎo)的從句使用一般過去時(shí)，用were；give up后面接動(dòng)詞的現(xiàn)在分詞。故選A。30． Had he studied harder, he_______ the exams.A．must have got through B．could get throughC．would get through D．would have got through【答案】D【解析】試題分析：句意:如果他學(xué)習(xí)再努力一點(diǎn)，他就能通過考試了。must have got through 一定通過；could get through 可能通過；would get through 會(huì)通過；would have got through 會(huì)通過。這句話中Had he studied 是一種省略倒裝的形式，相當(dāng)于If he had studied harder，是虛擬語氣的用法，從句中用的是過去完成時(shí)，這時(shí)主句用would +have +過去分詞。故選D?？键c(diǎn)：考查虛擬語氣。31． — I don’t know what to do.— If I you, I buy a guidebook.A．a(chǎn)m。 will B．a(chǎn)m。 would C．were。 will D．were。 would【答案】D