Hewouldhavegivenyoumorehelp,ifhe________sobusy.
A、havenotbeenB
本題考察與過去事實相反的虛擬語氣。
AtanyrateIdidnotsucceed_______myselfunderstoodbyyou.
CharlesSmith,______wasmyformerteacher,retiredlastyear.
He would have given you more help, if he ________ so busy.
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
_______foryourlaziness，youcouldhavefinishedtheassignmentbynow.
