被告知这个消息他们很惊讶。

　　I'm glad to hear this.

　　我很高兴听到这个。

　　(4)用于"be＋性质形容词＋不定式"结构中。常见的形容词有：easy, hard, difficult, interesting, heavy, pleasant, light, good, fit, comfortable, safe, dangerous, impossible等。

　　The box is not easy to carry.

　　这个箱子不易携带。

　　[点津]　在这一结构中，不定式to do用主动形式表示被动意义。

　　　8

　　①(全国卷Ⅱ改编)The old man sat in front of the television every evening, happy to_watch (watch) anything that happened to be on.

　　②(辽宁高考改编)This machine is very easy to_operate (operate). Anybody can learn to use it in a few minutes.

　　6．不定式作定语

　　(1)动词不定式常常放在抽象名词attempt, ability, chance, desire, determination, decision, effort, plan, way或不定代词something, nothing等后面作后置定语。

　　Do you have the ability to read and write in English?

　　你具备读写英语的能力吗？

　　I have no chance to go sightseeing.

　　我没有机会外出观光。

　　　9

　　①(北京高考改编)Volunteering gives you a chance to_change (change) lives, including your own.

　　②(北京高考改编)Birds' singing is sometimes a warning to other birds to_stay (stay) away.

　　(2)用来修饰被序数词、最高级或no, all, any等限定的中心词，且与中心词为主动关系。

　　He was the best man to do the job.

　　他是做这项工作最好的人选。

　　She was the first woman to win the gold medal in the Olympic Games.

　　她是在奥运会上第一个获得金牌的女性。

　　[点津]　不定式作定语时，如果其逻辑主语是句子的主语，不定式用主动形式；如果这个不定式是不及物动词，其后应有相应的介词。

　　The Browns have a comfortable house to live in.

　　布朗一家有一幢舒适的房子可以居住。

　　五、"疑问词＋动词不定式"结构

　　疑问词"what, how, when, where, which＋动词不定式"结构可作主语、表语和宾语等。

　　How to solve the problem is still a challenge for us.

　　如何解决这个问题对我们仍是一个挑战。

　　I don't know where to buy books of this kind.

　　我不知道到哪里去买这种书。

六、动词不定式的省略