高三英语语法总复习训练材料
动词不定式

一、不定式结构作主语
  To see one time is better than to hear a hundred times.  To persevere means victory!  注①：在很多情况下，尤其是在口语中，常采取先行it代替主语，而把不定式后置：  It’s a great pleasure to be here.  It is not an easy thing to master a language.  注②：这种后置不定式结构也适合用于一些谓语动词不是系动词句子，如：  It took us five hours to get there.  It made us very angry to hear him talk like that.
注③：不定式结构逻辑主语通常可在特定上下文或情景中看出，也能够由“ for + 名词词组” 来表示，如：  It is not hard for one to do a bit of good.  It was difficult for me to do the wo ...