以下是短文写作中使用率最高、覆盖面最广的基本句式，每组句式的功能相同或相似，考生可根据自己的情况选择其中的1-2个，做到能够熟练正确地仿写或套用。

　　4.表示重要、必要、困难、方便、可能

　　1)It is important(necessary，difficult，convenient， possible)for sb.to do sth.

　　2)We think it necessary to do sth.

　　3)It plays an important role in our life.

　　例如：

　　Computers are now being used everywhere，whether in the government，in schools or in business.Soon， computers will be found in every home，too.We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age.