Grammar and usage To-infinitive Bare infinitive 动词不定式由to+ 动词原形构成。这里的to 是不定式标志，没有词义。不定式具有名词、形容词或副词的某些语法功能，又有动词的时态和语态的特点及作用。.To-infinitive to do not to do to be done to be doing to have done to have been done Lead-in 不定式的基本形式 Examples He decided to study harder than before. The patient was warned not to eat oily food after the operation. Little Jim should love to be taken to the theatre this evening. When his father came in, he pretended to be reading. I would love to have gone to the party last n
