例如：What is the purpose of education? Some people may say that the purpose of education should be to create a totally academic environment that separates from the outside world, for, they think, this situation allows students to focus on their academic research work without being disturbed by practical concerns. In fact, this suggestion is harmful to the scientific research work.
这是某一篇文章的开头。我们现在只是分析语法问题。作者除了要注意不要使用疑问句以外，还有很重要的一点：总共两三句话，出现4个"Be"动词。这种写法，在英语里面被称作"non-act"的动词。"Be" 仅仅表示一种状态，例如："I am here", "you are there"。对于母语者来说，"Be"动词其实就是写在纸上，而没有任何感情色彩。所以应该尽量避免成篇累牍地使用。我们的例子可以改为：
Some people argue that the purpose of education lies in its strength in creating a totally academic environment separated from the outside world. They think this situation allows students to focus on academic research by excluding outside disturbance from practical concerns. However, this suggestion in fact does harm to the scientific research work.
我们可以看到，使用了lie in, exclude, do harm to以后，句子更有色彩了。