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Unit17(1)pasttense-ByLindaChapter17•TelevisionCommercials•DescribingPhysicalStatesandEmotions•TellingAboutthePast•BiographiesandAutobiographies•biographyautobiography•[baɪ'ɒgrəfi][ɔːtəbaɪ'ɒgrəfɪ]sad-happy[æ]clean-dirty[i:][ɜ:]or[ə:]heavy-thin['hevi][θɪn]hungry---full['hʌŋgrɪ][fʊl]sick--healthy[sɪk]['helθɪ]tiny-----enormous['taɪnɪ][ɪ'nɔ:məs]dull---shiny[dʌl]['ʃaɪnɪ]comfortable--uncomfortable['kʌmf(ə)təb(ə)l][ʌn'kʌmf(ə)təb(ə)l]tired—energetic[taɪəd][,enə'dʒetɪk]形容词反义词的构成（1）使用前缀un-，in-,im-,dis-,ir-来构成形容词的反义词:a.大多数形容词前面加un构成反义词，如：happy-unhappykind-unkindtrue-untrueable-unablecomfortable-uncomfortablefriendly-unfriendlyb.以c开头的形容词用前缀in-构成反义词，如：correct-incorrectc.以p开头的形容词用前缀im-构成反义词，如：possible-impossiblepolite-impolited.以r开头的形容词用前缀ir-构成反义词，如：regular-irregulare.有些形容词用前缀dis-构成反义词，如：honest-dishonestagreeable-disagreeable形容词反义词的构成（2）commercial[kə'mɜ:ʃ(ə)l]commercials[kə'mɜ:ʃ(ə)lz]n.商业广告；宣传（commercial的复数）presto['prestəu]adj.迅速的adv.赶快n.急板；急板之乐曲或乐章int.转眼间['vɪtəmɪn;'vaɪt-]['sɪərɪəl][skɪm]be动词：iswasarewere现在式过去式waswasit'sit'swaswasit'sit'swerewasthey'reit's['tu:θpeist][rekə'mend][rekəmen'deiʃən]thankyou!seeyou!