精选优质文档-倾情为你奉上动词不定式和动名词是英语非谓语动词的两个重要部分一、作主语1、不定式作主语 ：动词不定式可直接用作主语, 句子的谓语动词常用单数。To get there by bike will take us half an hour. 对于主语较长的不定式，可以用it作形式主语。例如：Its our duty to take good care of the old. How long did it take you to finish the work It is difficult for us to finish writing the composition in a quarter of an hour. It seemed impossible to save money. Its kind of you to help me with my English.2、动名词作主语：动名词也可直接用作主语，或者用it 作形式主语。例如：Learning without practice is no good
