句型(1) 不定式短语 + 谓语动词
句型(2) It's + 形容词 + for/of 逻辑主语 + 不定式短语
句型(3) It's + 名词 + for 逻辑主语 + 不定式短语
在这一条目中,只讲述句型(1),例外两个结构在以下条目中讲述。
To know oneself is difficult.了解自己很困难。
在英语句子的表述中倾向主语短小一些,谓语部分长一些,以保持句子的结构平衡。故上句可以改写如下:
It's difficult to know oneself.
To go to school on foot every day takes me half an hour.
It takes me half an hour to go to school on foot every day.
我每天步行上学花费半个小时。
To read this book through will require time and patience.
It will require time and patience to read this book through.
读完这本书需要时间与耐心。