1.中文：她在弹钢琴。

　　(误)She was playing piano.

　　(正)She was playing the piano.(演奏乐器，如piano，violin，乐器前面要加定冠词the.)

　　2.中文：孩子们每天早上去上学。

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

　　(正)The children go to school every morning.(go to school是习惯用语，不加the.)

　　3.中文：她有一头秀发。

　　(误)She has a beautiful hair.

　　(正)She has beautiful hair.(hair指头发的整体，是不可数名词，前面不加a.)

　　4.中文：她喜欢看电视。

　　(误)She likes to watch the TV.

　　(正)She likes to watch TV.(看电视，习惯上TV前不加the.)

　　5.中文：她在房间里听广播。

　　(误)She was listening to radio in the room.

　　(正)She was listening to the radio in the room.(听广播，习惯上radio前面加the.)

　　6.中文：尼罗河是埃及最长的河。

　　(误)Nile River is the longest river in Egypt.

　　(正)The Nile River is the longest river in Egypt.(在河流，山脉等名称前要用定冠词。)

　　7.中文：天气不错。

　　(误)It's a nice weather.

　　(正)It is nice weather.(weather是不可数名词，前面不加a.)

　　8.中文：下星期再见。

　　(误)See you again the next week.

　　(正)See you again next week.(next week表示将来;the next week表示过去。)

　　9.中文：历史是很有趣的学科。

　　(误)The history is a very interesting subject.

　　(正)History is a very interesting subject.(学科前一般不加冠词。)

　　10.中文：他乘火车来这里。

　　(误)He came here by a train.

　　(正)He came here by train.(by后接交通工具，中间不加冠词。)

　　11.中文：今晚你可以看到满月。

　　(误)You may see the full moon tonight.

　　(正)You may see a full moon tonight.(月亮，太阳等独一无二的物体，当有形容词修饰时可加a.)

　　12.中文：她刚才去了保罗街。

　　(误)She went to the Paul Street just now.

　　(正)She went to Paul Street just now.(街道名称前一般不加the.)

　　13.中文：连孩子都会做它。

　　(误)Even child can do it.

　　(正)Even a child can do it.(不定冠词+单数名词表示某类人或物。)