1.中文：她在彈鋼琴。

(誤)She was playing piano.

(正)She was playing the piano.（演奏樂器，如piano，violin，樂器前面要加定冠詞the。）

2.中文：孩子們每天早上去上學。

(誤)The children go to the school every morning.

(正)The children go to school every morning.（go to school是習慣用語，不加the。）

3.中文：她有一頭秀發。

(誤)She has a beautiful hair.

(正)She has beautiful hair.（hair指頭發的整體，是不可數名詞，前面不加a。）

4.中文：她喜歡看電視。

(誤)She likes to watch the TV.

(正)She likes to watch TV.（看電視，習慣上TV前不加the。）