no more…than與not more…than

有這樣一道考題，請看是該選no more…than還是not more…than？

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

【分析】容易誤選A。要做對此題，首先要正確理解以下結構的含義：

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 后形容詞的反面)

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。

通過以上分析，再結合句子語境，可知此題最佳答案為B。