表示“具有……性质的”的后缀(1)-al表示“具有……性质的,……方面的”。如:person→personal个人的environment→environmental环境的以e结尾的单词则去e再加al。如:nature→natural自然的culture→cultural文化的(2)-ful表示“充满……的,具有……性质的”。如:power→powerful强大的success→successful成功的care→careful小心的,细心的wonder→wonderful精彩的(3)-ive表示“有……性质的,有……作用的,属于……的”。如:effect→effective有效的subject→subjective主观的act→active积极主动的attract→attractive迷人的,吸引人的即时练习一、按要求改写下列单词。n.orv.词义adj.词义nation国家国家的practice实践实用/际的profession专业职/专业的harm伤害有害的success成功成功的truth真实真确的create创造有创造力的compete竞争有竞争力的expense花费费用大的nationalpracticalprofessionalharmfulsuccessfultruthfulcreativecompetitiveexpensive二、用括号内所给单词的正确形式填空。1.Iam________(grate)toyouforyourhelp.2._______(globe)warminghasbecomeaseriousproblemtotheworld.gratefulGlobal3.Hegavemesome____________(construct)suggestions.4.Ajury’sdecisioninacourtcasemustbeabsolutely____________(object).constructiveobjective5.It’sso________(peace)outhereinthecountryside.6.The______(centre)andlocalgovernmentshavetakenevery___________(effect)measuretorescuethesurvivors.effectivepeacefulcentral