good——goodnessbusy——businessdifferent ——differenceforeign ——foreignedifficult ——difficultysafe ——safettrue——truthdry ——droughconfident ——confidence （信心）proud ----Pridimportant ---improtance 五、形容词变为副词①+ly useful, wide, strong②改为再加healthy , heavy, happy, lucky, noisy, good ——well terrible---terribly probable---probably 六．形容词和副词同形。earlyenoughfastfarfirsthardhighlatemuchrightstraight七、否定的unluckyunknownunlikeunhappyunusualunfriendlydiscoverdisappeaimpossiblecarelesshomeless八、其它。cross——across pass——past science ——scientist library——librarian friend ——friendship