Ada is prettier than Amy.

  • Ada is prettier than Amy. (艾達比艾美漂亮) (正)
  • Ada is more prettier than Amy. (誤)

解說:prettier 已經是 pretty 的比較級,不可再使用表示「更多,更加」的比較級副詞 more,否則就變成了「雙重比較級」(double comparatives),即「more + 比較級」。這是一項常見的錯誤,尤其是在講話時。同樣地,「雙重最高級」(double superlatives),即「most + 最高級」,也是常見的文法錯誤,必須避免。例如:

  • She is the richest woman in Taiwan. (她是台灣最有錢的女人) (正)
  • She is the most richest woman in Taiwan. (誤)

Formosan clouded leopards, which, as their name suggests, are native to Taiwan, are extinct.

  • Formosan clouded leopards, which, as their name suggests, are native to Taiwan, are extinct. (台灣雲豹 - 顧名思義,為台灣土生的動物 - 已滅絕) (正)
  • Formosan clouded leopards which, as their name suggests, are native to Taiwan are extinct. (誤)

解說:關係子句 “which are native to Taiwan” 係 Formosan clouded leopards 的額外補充資料,須為非限定性子句 (non-restrictive clause),亦即其前後都要有逗點。

A bag of potatoes was discovered in his car.

  • A bag of potatoes was discovered in his car. (他的車上被發現一袋馬鈴薯) (正)
  • A bag of potatoes were discovered in his car. (誤)

解說:「A bag of + 複數可數名詞」若當句子的主詞,其真正的主詞為 bag,後面須接單數動詞,亦即句子的主動詞須與 bag 一致,而不是跟複數可數名詞一致。介系詞片語「of + 複數可數名詞」係當形容詞用,修飾 bag,對動詞沒有影響。除 a bag of 外,a box of, a pack of 等片語的用法亦同。

I like some desserts. They are ice cream, strawberry shortcake, and apple pie.

  • I like some desserts. They are ice cream, strawberry shortcake, and apple pie. (我喜歡若干飯後甜點。它們是冰淇淋、草莓蛋糕和蘋果派) (正)
  • I like some desserts. They are: ice cream, strawberry shortcake, and apple pie. (誤)

解說:冒號 (colon) (:) 的前面 (左邊) 須為獨立子句 (independent clause),而 “They are” 並非獨立子句。下句為一個正確使用冒號的句子:

  • I like the following desserts: Ice cream, strawberry shortcake, and apple pie. (我喜歡下列飯後甜點:冰淇淋、草莓蛋糕和蘋果派)