1、初中阶段加前后缀构成反义词归纳1. un-able- unablecomfortable-uncomfortablefair- unfairfriendly- unfriendlygrateful- ungrateful(不领情的 )happy- unhappyhealthy- unhealthyhelpful- unhelpful(无帮助的 )important- unimportantkind- unkindknown- unknownlucky- unluckynecessary- unnecessarypleasant- unpleasantpopular- unpopulartidy
2、- untidyusual- unusualwelcome- unwelcome2. lesscareful-carelesshelpful-helpless(无助的，需要帮助的 )useful- uselessharmful- harmlesshopeful-hopelessmeaningful- meaninglessend- endless3. dis-honest- dishonestagree- disagreelike- dislikeappear- disappearadvantage- disadvantage4. in-correct- incorrectactive- in
3、active5.im-possible- impossiblepolite- impolitepatient- impatient6.ir-regular- irregular一类：加前缀-un例词：unhappy unusual ungrateful unhelpful unkind 第二类：加后缀-less例词：careless homeless hopeless第三类：加前缀-im例 词：impolite(不礼貌的) impatient（不耐心的） impossible（不可能的）第四类：加前缀-in例词：incorrect（不正确的） inactive（不活跃的）第五类：加前缀-dis例词：dishonest （不诚实的）第六类：加前缀-ir例词：irregular（不规则 的）归纳：初中阶段绝大多数形容词都是加前缀-un 构成其否定形式，记忆起来工程浩大，比较困难。但如果我们把不是加-un 前缀而是加-im, -in, -dis, -ir 等前缀的这七个单词牢记的话，那么就能达到事半功倍的效果。
