又如：

Congratulations!

cook

［误］

My father is a good cooker.

［正］ My father is a good cook.

［析］ 很多动词加上er则变为执行该动作的一种人，如work

worker,teach

teacher. 但cook即是动词"做饭"，同时名词也是"厨师"。而cooker则是"厨具"、"炊具"之意。如：I will cook the dinner. I bought a good press cooker(高压锅)。 corner

［误］

There is a post office in the corner of the street.

［正］

There is a post office at the corner of the street.

［误］

A girl sat at the corner of the room.

［正］

A girl sat in the corner of the room.

［析］ in the corner是在建筑物内部的角上，而at the corner是在外部的角上，如：There is a big tree at the corner of the building.

cost

［误］

I cost ten dollars for the book.

［正］

I spent ten dollars on the book.

［误］ I cost two hours to do my homework.

［正］

It took me two hours to do my homework.

［析］ cost, spend. take都可以作"花费"讲，但用法不同。cost的用法是

"something+cost+somebody+时间或金钱"，如：The book cost me ten dollars. spend的用法是"somebody+spend+时间+(in)doing something"，如：I spent two hours (in) writing this book. 或"somebody+spend+金钱+on something"，如：I spend two dollars on this book. 而take的用法则要用逻辑主语it:"It+takes+somebody+时间+to do something", 如：It took me an hour to clean the classroom.

country

［误］

You can find cows in a country.