1. 词组in the front of和in front of都有“在……前面”的意思，但含义不同。in the front of表示“在……（范围内的）前面”；而in front of表示“在……（范围外的）前面”。如：

He likes to sit in the front of the classroom.

他喜欢坐在教室的前排。

There is a pond in front of the house.

房屋前面有个池塘。

2. At table意为“吃饭；进餐”；at the table意为“在桌边”。如：

He seldom talks at table.

他吃饭时很少说话。

We sat at the table，talking.

我们坐在桌边交谈。

3. Go to school意为“开始求学；到校上课”；go to the school意为“去学校（但不一定是上学）。”如：

He usually goes to school by bike.

他通常骑自行车到校上课。

His mother often goes to the school to see him.

他的妈妈经常去学校看他。

4. In charge of（=take charge of），意为“主管；看管；在……看管之下”，主语是人；in the charge of意为“负责管理；负责照料”，主语是事物（物）。如：

Miss Wang was in charge of our class.

王老师负责管理我们班级。

Our class was in the charge of Miss Wang.

我们班级由王老师负责管理。

5. At sight意为“一看见就”，一般放在句末；at the sight of意为“在看到……时”，可放在名首或句末。如：

He plays music at sight.

他即时看谱演奏。

At the sight of the police officers the thief ran off.

小偷一看见警察就跑了。

6. Go to sea意为“出海，当水手（=become a sailor）”；go to the sea意为“去海边”。如：

When he was a boy，his greatest wish was to go to sea.

他小时候最大的愿望就是去当水手。

He went to the sea for a holiday.

他去海边度假了。