【文章內(nèi)容簡介】 假設(shè)的條件不能實(shí)現(xiàn)則是非真實(shí)條件句。通常有三種情況：①與過去事實(shí)相反。②與現(xiàn)在事實(shí)相反。③與將來事實(shí)可能相反。21． If I went to the moon, I ______ bring something unusual back to the earth.A．couldB．willC．wouldD．shall【答案】C【解析】試題分析：此題考查if引導(dǎo)的條件狀語從句的相關(guān)知識。根據(jù)語境可知此句的含義是如果我去月球，我會帶回一些不同尋常的東西。這個(gè)假設(shè)成立的幾率很小，故看為虛擬語氣。根據(jù)語法知識可知從句要用一般過去時(shí)，主句要用過去將來時(shí)，過去將來時(shí)的基本構(gòu)成would+動(dòng)詞原形，故選C。考點(diǎn)：if引導(dǎo)的條件狀語從句點(diǎn)評：if既可以引導(dǎo)賓語從句又可以引導(dǎo)狀語從句。if充當(dāng)賓語從句的連接詞時(shí)，相當(dāng)于whether，詞義為“是否”，遵循賓語從句的時(shí)態(tài)規(guī)則，可根據(jù)語境選擇任何時(shí)態(tài)；充當(dāng)從屬連詞，引導(dǎo)條件狀語從句時(shí)，詞義為“如果”，若主句中的謂語動(dòng)詞用一般將來時(shí)，則從句中的謂語動(dòng)詞通常用一般現(xiàn)在時(shí)表示將來。22． 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：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。23．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．Mr. White _____ at 8:30 for the meeting, but he didn39。t show up.A．should have arrived B．should arriveC．should have had arrived D．should be arriving【答案】A【解析】試題分析：句意：懷特先生本來應(yīng)該在8：30到會，但他卻沒有出現(xiàn)。should have done：本來應(yīng)該做某事而實(shí)際上沒做。故選A考點(diǎn)：情態(tài)動(dòng)詞25．If I __________you. I would buy a big house for my parents.A．be B．a(chǎn)m C．was D．were【答案】D【解析】試題分析：句意：如果我是你。我會買一個(gè)大房子給我的父母。這道題考查的是假設(shè)，所以要用虛擬語氣，用過去時(shí)。故選D.考點(diǎn)：考查虛擬語氣的用法。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，我肯定會幫助你的，但是我太忙了。對過去的虛擬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．What would you do if you _____ the traffic accident?I would ______.A．see,do my housework first B．saw。buy some fruit right awayC．see。call at 110 at once D．saw。call the police right away【答案】D【解析】考查虛擬語氣和情境交際的用法。問句使用了虛擬語氣，從句中應(yīng)使用一般過去時(shí)；根據(jù)traffic accident，應(yīng)及時(shí)報(bào)警。28．— 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。29．If I a boss, I would manage a big factory.A．a(chǎn)re B．wasC．were D．be【答案】C【解析】試題分析：句意：如果我是老板，我會經(jīng)營一家大型工廠。由句意可知，此句是虛擬語氣，if引導(dǎo)的從句應(yīng)該用過去式的形式，其中第一人稱用were，故答案為C?？键c(diǎn)：考查虛擬語氣。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 會通過；would have got through 會通過。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。考點(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【解析】試題分析：句意：我不知道做什么？如果我是你，我就會買一本指南。虛擬語氣是一種特殊的動(dòng)詞形式，用來表示說話人所說的話并不是事實(shí)，而是一種假設(shè)、愿望、懷疑或推測。其主要有三種結(jié)構(gòu)：與現(xiàn)在事實(shí)相反若與現(xiàn)在事實(shí)相反，條件從句的謂語用過去式（be通常用were），主句謂語用“should （would, could, might）+動(dòng)詞原形”與過去事實(shí)相反若與過去事實(shí)相反，條件從句的謂語用過去完成時(shí)（had+過去分詞），主句謂語用“should （would