instead作副词,是“代替”、“顶替”的意思。如:mr.wangisill,iwilltakehisclassinstead.insteadof为介词短语,它后面可跟名词、代词、动名词、介词短语或形容词等。如:(1)iwillcleanthewindowinsteadofhim.(2)wewillskateinsteadofplayingfootball.