7.5 不定式作表语

　不定式可放在be动词后面，形成表语。例如：
　　 My work is to clean the room every day.
　　 His dream is to be a doctor.

7.6 不定式作定语

　 不定式做定语通常要放在被修饰的词后。例如：
　　　I have a lot of work to do.　
　　　So he made some candles to give light.