16．We oughtn't eat junk food，ought we？oughtn't后加to．

分析 我們不應(yīng)當(dāng)吃垃圾食物，對(duì)嗎？

解答 答案：oughtn't后加to 考查句子改錯(cuò)．ought to是固定搭配，意為"應(yīng)當(dāng)，應(yīng)該"，是情態(tài)動(dòng)詞，其否定式在ought后加not．

點(diǎn)評(píng) 單句改錯(cuò)涉及詞匯、語(yǔ)法、句型結(jié)構(gòu)等方面的知識(shí)和邏輯情理的推斷和綜合辨析能力，是一種在較高層次上考查考生對(duì)英語(yǔ)知識(shí)的掌握和語(yǔ)言綜合運(yùn)用能力的測(cè)試題型．它是專門針對(duì)考生們平時(shí)學(xué)習(xí)英語(yǔ)過(guò)程中，尤其是寫作練習(xí)中常犯的又是較為普遍的錯(cuò)誤而設(shè)計(jì)的．

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