【文章內(nèi)容簡介】 去分詞），主句謂語用“should （would, could, might）+have+過去分詞”與將來事實相反 若與將來事實相反，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）+動詞原形”。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引導的是一個虛擬的條件句，在虛擬句中，be用were，主句通常用過去的一種，will應該用would，故本題選B?？键c：if引導的虛擬條件句。點評：在英文中條件句有兩種，一種是真實的條件句，if后遇到將來時用一般現(xiàn)在時，一種是虛擬的條件句，if后用過去時，be用were，在英文的實際使用中應該注意它們的區(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。第二空，虛擬語氣，與現(xiàn)在相反，用過去時，be動詞用were。故選C23．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：懷特先生本來應該在8：30到會，但他卻沒有出現(xiàn)。should have done：本來應該做某事而實際上沒做。故選A考點：情態(tài)動詞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”。本題考查對將來的虛擬語氣。即“if+過去時，主語+should/would/could/might do”結構。故選B。點睛：虛擬情況從句主句對現(xiàn)在的虛擬過去式（be一般用were）should/would/could/might+do對過去的虛擬had+過去分詞should/would/could/might+have done對將來的虛擬過去式（be一般用were）should/would/could/might+doshould+動詞原形were+to do25．If I were invited to the party，I _______ a red skirt.A． will wear B． wear C． would wear【答案】C【解析】試題分析：如果我被邀請參加聚會，我會穿紅色的裙子。此處考查虛擬語氣。句中，主句和從句的謂語都要用虛擬語氣，與現(xiàn)在事實相反的假設，從句（條件句）動詞過去式（ be一般用were）。主句（結果句） should /would/ could/ might +動詞原形。故答案為C?？键c：考查虛擬語氣。 26．—Mum, can I go shopping with Gina?—Well, If I were you, I homework first. A．will do B．have to finish C．must finish D．would do【答案】D【解析】試題分析：句意：媽媽，我能和吉娜去購物嗎？——哦，如果我是你，我會首先完成作業(yè)。結合語境可知主句表示的是對現(xiàn)在的虛擬，故用過去將來時態(tài)，選D?？键c：虛擬語氣點評：虛擬語氣是一種特殊的動詞形式，用來表示說話人所說的話并不是事實，而是一種假設、愿望、懷疑或推測。判斷是真實條件句還是非真實條件句。只有在非真實條件句中才使用虛擬語氣。通過句子意思，看假設的條件是否能夠?qū)崿F(xiàn)，能夠?qū)崿F(xiàn)是真實條件句，不能使用虛擬語氣；假設的條件不能實現(xiàn)則是非真實條件句。與現(xiàn)在事實相反 若與現(xiàn)在事實相反，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）+動詞原形” 與過去事實相反 若與過去事實相反，條件從句的謂語用過去完成時（had+過去分詞），主句謂語用“should （would, could, might）+have+過去分詞”與將來事實相反 若與將來事實相反，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）+動詞原形”：27．What_____you do if you had a million dollars ? A．would B．will C．did D．do【答案】A【解析】考查點：虛擬語氣。解題思路：根據(jù)句意:如果你有一百萬你將會干什么？ “如果你有一百萬”是對現(xiàn)在的一種假設，與現(xiàn)在的事實相反。表示與現(xiàn)在事實相反的虛擬語氣的結構是：主句用should/would/could/might+動詞原形，從句用一般過去時態(tài)。故選A。28．—Swimming in the river for teenagers is very dangerous.—So it is. If I ________ them, I ________ a shower at home.A．a(chǎn)m。 would take B．were。 will takeC．was。 would take D．were。 would take【答案】D【解析】試題分析：—在河里游泳對青少年是非常危險的。—的確如此。如果我是他們，我會在家洗澡。if從句表假設，與現(xiàn)在事實相反，be動詞則用were ，無論第幾人稱做主語。主句常用would 跟動詞原形。故選D?？键c：考查固定句式的用法。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引導的從句應該用過去式的形式，其中第一人稱用were，故答案為C?？键c：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:如果他學習再努力一點，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，這時主句用would +have +過去分詞。故選D?？键c：考查虛擬語氣。31． — I don’t know what to