5. 目的状语从句: 常由so that和in order that引导

　　 Eg: Millions of people have to spend more time and energy on studying new skills and technology so that they can keep a favorable position in job market.
　　成千上万的人们不得不花费的精力和时间学习新的技术和知识，使得他们在就业市场能保持优势。

　　第三， 宾语从句。

　　 Eg: Some people claim that government should be mainly responsible for the environmental pollution.

　　一些人认为政府应对环境污染负主要责任。
　　 Eg: Many experts point out that, along with the development of modern society, it is an inevitable result and there is no way to avoid it.

　　许多专家指出这是现代社会发展必然的结果，无法避免。

　　第四， 同位语从句。

　　 Eg: It is an undeniable fact that environmental pollution becomes increasingly serious.

　　环境污染变得越来越严重是不可否认的事实。

　　 Eg: No one can deny the basic fact that it is impossible for average workers to master those high-technology skills easily.

　　没有人能否认这一基本事实：对于一般工人来讲，轻松掌握这些技术是不可能的。

　　第五，主语从句。

　　 Eg: What has caught our attention is /It is noticeable that the environment in both the rural and urban areas is deteriorating.

　　值得注意的是农村和城市的生态环境都在不断恶化。

　　 Eg: It is universally acknowledged that environmental pollution becomes one of the most serious problems in China or even the world as a whole.

　　众所周知，环境污染问题是中国乃至世界面临的最为严重的问题之一。

　　第六，强调句: It is + 被强调的内容 + that

　　 Eg: It is cars and factories that release a great deal of gases, polluting the environment.

　　汽车和工厂排放大量的废气，使得环境被污染。