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在前两期，谈过了不定式动词短语具有副词功能，可以修饰谓语动词。这里要谈的是不定式动词或短语的另一种功能：修饰形容词。 下列是四种不同情况： ⒈主语是人，句子里的形容词用来反映主语的情绪或感受 ，如： ① I am sorry to have to say good-bye to you. ② Tom was angry to hear Janet complain so much. ③ Are you glad to return to Singapore after so many years abroad? ④ The students were bored to listen to the same story time and again. ①-④里的不定式动词短语（infinitive phrases）都在修饰前面的形容词或等同语，把形容词的含义进一步带出来。 类似的形容词甚多，包括：happy, proud, furious, impatient ；还有形容词等同语 amazed, annoyed, ashamed, delighted 等，也适用于此。 ⒉主语也多数是人，形容词反映主语的意图，如： ⑤ Sometimes, old staff are reluctant to help new recruits. ⑥ Why are you so anxious to go home? ⑦ I am inclined to befriend good people. ⑧ Bill is prone to get mad. ⑨ Jack is determined to go abroad for further studies. ⑩ It you have any problem, please let me know. I will be most willing to help you. | 
