只能以不定式作宾语的动词：afford, agree, arrange, ask, attempt, claim, dare, decide, decline, desire, determine, endeavor, expect, pretend, happen, hope, learn, long,
①被修饰的名词前有序数词、形容词最高级或next, last, only等限定词是，只能用不定式②不定代词something, nothing, little, much, a lot等习惯上用不定式作定语。I have something to tell you. He is always the last one to leave the classroom.
Worrying---worried
现在分词表示主动，表示正在进行
现在分词作状语时，现在分词的动作就是句子主语的动作，它们之间是主动关系。He went out shutting the door behind him.
过去分词表示被动含义，表示状态或完成的事。He is an advanced teacher.
get to, turn to, adjust to, accustomed to,
分词
若人对事物有兴趣：sb is interested in sth
若事物本身有兴趣：sth is interesting
如：interesting---interested, exciting---excited, delighting---delighted, disappointing---disappointed, pleasing---pleased, puzzling---puzzled, satisfying---satisfied, surprising---surprised,
表抽象动作，一般性的行为。His hobby is collecting stamps.
只能以动名词作宾语的动词：admit, acknowledge, advise, allow, anticipate, appreciate, consider, avoid, enjoy, excuse, fancy, favor, forgive, quit, resent, resist, risk, suggest, understand, endure, be used to, object to, devote oneself to, stick to, respond to, confess to, submit to, look forward to, agree to, see to, adapt to, apply to, accede to,
过去分词作状语时，过去分词表示的动作是句子主语承受的动作，它们之间是被动关系。Given more attention, the trees could have grown better.
主语
表语
宾语
定语
状语
不定式
表具体动作；表一件未完成的事或目的。It is not good for you to smoke so much. Tห้องสมุดไป่ตู้ study abroad has long been my dream.
表具体动作，特别是将来动作。To do two things at a time is to do neither.
可表示目的，结果，原因。They stood by the roadside to talk about the plan. His family was too poor to support him. We are glad to hear the news.
动名词
表抽象动作；表已知的事或经验。Smoking is prohibited here. Climbing mountain is interesting.