求教 This printer is of good quality.If it ________ break down within the first year,we would

题目

求教 This printer is of good quality.If it ________ break down within the first year,we would
repair it at our expense.A would,B should ,C could ,D might 答案是B但是我不知道为什么

答案

B是对的,这是一种虚拟语气,表示与将来的事实相反或者可能性极小.“虚拟将来时将来的假想情况还可用should引起短语表示,表示实现可能性不大的情况,可译为“万一……”,这时主句中的谓语动词用will或would引起都可以：...