請看題，答案是哪個？
You are _________ careful than your brother. You two can’t do the work that needs care and skill.
A. not more B. no more C. not less D. no less
選對此題，至少要弄清兩點：一是下文的語境，二是 not more than, no more than 等結構的含義。下文說 You two can’t do the work that needs care and skill(你們兩個都不适合做這需要細心和技巧的工作)，這就表明這兩個人都不是很仔細的人。再看選項中所涉及的幾個結構的意思：
not more … than = 不如……
no more … than = 和……一樣不(否定兩者)
not less … than = 不如……不（即指不如 less 後形容詞的反面）
no less … than = 和……一樣(肯定兩者)
比較以下各句的意思：
You are more careful than he is. 你比他仔細。
You are not more careful than he is. 你不如他仔細。
You are no more careful than he is. 你和他一樣不仔細。
You are less careful than he is. 你不如他仔細（你比他粗心）。
You are not less careful than he is. 你比他仔細（你不如他粗心）。
You are no less careful than he is. 你和他一樣仔細。
綜合以上分析，上面一題的最佳答案應是B。
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