world

1.in the world不可滥用，如下面四句里的in the world都该删去。

• Everybody ought to work in the world.
• China is a great country in the world.
• He has published a good work on the subject in the world.
• This book contains many famous stories in the world.

下面四句里的in the world用得不错。注意第一句和第三句里有属于最高级词，第二句里有only，第四句里有否定词nothing：

• China is one of the greatest countries in the world.
• He has published the only work on the subject in the world.
• This book contains many of the most famous stories in the world.
• Nothing in the world disturbs her.

2.all over the world，all the world over，the world over和the whole world over四语意思相同。例如：People all over the world（或all the world over，或the world over，或the whole world over）who are studying English as a foreign language do not find it easy to use idiomatic expressions fluently.

3.The whole world knows it里的world统指“世界上的人们”或指“一般人们”，通常当作单数，所以用knows。all the world who（或that）are interested in this subject里的world当作复数，all the world that（或which）is interested in this subject里的world当作单数，注意不可说all the world who is interested in this subject或all the world which are interested in this subject。

4.下面两句意思相同，第一句普通些：

• I hope this practice will do you of world of good.
• I hope this practice will do you worlds of good.