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.
5、表示措施
1)We should take some effective measures.
2)We should try our best to overcome (conquer) the difficulties.
3)We should do our utmost in doing sth.
4)We should solve the problems that we are confronted (faced) with.
例如：The housing problem that we are confronted with is becoming more and more serious. Therefore, we must take some effective measures to solve it.
好的句子结构可以使文章看起来更漂亮更有逻辑，托福写作中需要运用句子结构的变化来体现写作水平并能使文章更富含多样性。同学们要仔细学习以上5种句型并且做到融会贯通，运用到实际的写作当中。
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