当被修饰名词前有序数词,形容词最高级等限定词时,这时名词用不定式做定语。例子:the first men to set foot on the moon. 表示方式,原因,时间,机会等名词也要用不定式做定语。例子:天the opportunity to chance your lifestyle. 不定代词something,nothing,little,much,a lot用不定式做定语。例子:there is still much to be improved。真是据我知道的