不定式是动词的一种非限定形式。它和to字有着密切的关系。to字已成为动词不定式的符号或记号。我们不禁要问,这个标志着动词不定式的to字和介词的to究竟有什么分别呢?这个to字是不是介词呢?to字本来就是介词。在古代,英语的动词不定式有两种形式:一种由一个简单的动名词构成,前面没有to字,例如drincan;另一种是在动词不定式之前加一个to字,用 Infinitives are an unqualified form of verbs. It has close relationship with to word. to word has become an infinitive symbol or token. We can not help but wonder whether this to-word for to and infinitive marks the infinitive verb. What is the to-word to preposition? In ancient times, there were two forms of English infinitive infinitive: one consisted of a simple nouns, without to words in front, such as drincan, and the other with a to word before the infinitive