ability to do 中动词不定式 to do 作定语还是 目的状语?原句 I feel sure about your own ability to do things and be successful

ability to do中动词不定式是句子中的目的状语还是ability的定语 ability to do 中动词不定式 to do 作定语还是 目的状语?原句 I feel sure about your own ability to do things and be successful they have much homework to do.中为什么是to do?而不是do?什么是动词不定式?什么时候用动词不定式? Everyone is born with the ability to learn.to learn是动词不定式吗,它在句中什么成分? 动词不定式to do详细用法 什么时候才用动词不定式.to do to do sth.是动词不定式吗? 英语动词不定式问题：I am happy to see you 中 to see 这个动词不定式做什么成分（状语?补足语?...主语+be动词+adj.+to do 中动词不定式做什么成分? 有哪些动词后用动词不定式（to do） 动词to do sth 和动词不定式有区别吗 Do you have anything important to tell us?中动词不定式做什么成分? 英语语法中,动词不定式to do表示被动和动词不定式的被动语态to be done表示被动有什么用法区别 英语语法中,动词不定式to do表示被动和动词不定式的被动语态to be done表示被动有什么用法区别 动词不定式中to do 中to的词性,肯定不是介词,介词后应是doing,每个单词都有词性, 动词不定式开头的to do=doing吗 哪些动词后面跟不定式,（to do） 所有加动词不定式to do的句型 regret to do want to do这类动词后加to do的 是动词短语 还是动词不定式短语