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形容词的否定(反义词)★加前缀一．在单词前加‘un’1.comfortable→uncomfortable2.happy→unhappy3.necessary→unnecessary4.important→unimportant5.friendly→unfriendly6.welcome→unwelcome7.able→unable8.common→uncommon9.successful→unsuccessful10.excited→unexcited11.healthy→unhealthy12.popular→unpopular13.suitable→unsuitable14.grateful→ungrateful15.kind→unkind16.likely→unlikely17.safe→unsafe(dangerous)18.helpful→unhelpful19.usual→unusual20.willing→unwilling21.pleasant→unpleasant22.real→unreal23.lucky→unlucky24.luckily→unluckily25.tidy→untidy二．在单词前加‘dis’honest→dishonest三．在p,b,m开头的形容词前加‘im’1.possible→impossible2.polite→impolite(rude)3.patient→impatient四．在单词前加‘in’1.correct→incorrect2.correctly→incorrectly3.expensive→inexpensive(cheap)五．在r开头的形容词前加‘ir’regular→irregular★改后缀1.careful→careless2.carefully→carelessly3.useful→useless★不一样的单词1.boring→interesting2.cheap→expensive3.closed→open4.close→far5.cold→hot6.dark→bright/light7.easy→difficult8.fast/quick→slow9.fast/quickly→slowly10.heavy→light11.hungry→full12.large→small13.long→short14.strong→weak15.young→old16.right/correct→wrong17.dangerous→safe18.dirty→clean19.empty→full20.noisy→quiet21.soft→hard22.generous→mean23.true→false24.thin/slim→fat25.male→female