Question

The washing machine is of excellent quality. If there __________ be any problem within the first three years, we would fix it for free.

A．could

B．might

C．shall

D．should

Answer 1

D

試題分析：考查虛擬語氣：句意：洗衣機質(zhì)量很好，如果三年之內(nèi)出現(xiàn)問題，我們免費維修，主句用的是would do表示和將來情況相反的虛擬語氣，從句可以四should do，也可以是were to do或過去時。選D。
點評：虛擬語氣在條件句中的用法是：虛擬條件句 與現(xiàn)在事實相反的假設(shè)，從句是If+主語+動詞的過去式（動詞be用were)，主句是：主語+should,would, might,could＋動詞原形；與過去相反的假設(shè)從句用：If+主語+had +過去分詞，主句是：主語＋should, would, might, could ＋have done；與將來相反的假設(shè)，從句用1、If+主語+動詞過去式，主語＋should, would  do，2、If+主語+were to+ 動詞原形，加主句3、If+主語+should +動詞原形 ，加上主句的might, could＋動詞 原形