1、表示向;至;往:She's going to London;她要去伦敦。
2、(用于表示一系列事物或一段时间的尽头或限度)直到:from Monday to Friday从星期一到星期五 from beginning to end从开始到结束。
3、用于表示接受者:Give that to me,把那个给我。
4、表示接触到;针对:He put his hands to his ears,他将两手捂住耳朵。
首先,动词不定式符号to无词义。第二,它的形式是后面必须接动词原形,构成不定式短语,第三,在所作的成分上不定式to do通常作主语、表语、状语、宾语、宾语补足语或后置定语。例如:
1. To see is to believe.眼见为实。(to see作主语)
2. My aim is to speak English fluently.我的目标是讲好英语。 (作表语) 3. It is never too late to learn.学习从来不迟。(作结果状语)
4. She went home to look after her little sister. 她回家为了照顾她的小妹妹。 (作目的状语)
5. I decided to go home. 我希望回家。(作宾语)
6. I asked him to clean the classroom. 我叫他打扫教室。 (作宾语补足语) 7. He has many things to do.他有好多事要做。(作后置定语)