英语中有一些看起来极为相似的词组，不同之处仅仅在于是否含有定冠词the。小心了，有时它们表示的意义并不同。
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。