Planes, helicopters used to fight the fire
句子来自2019版人教版高中英语新教材必修一的 Unit 3(p49)。
请分析used to 的用法,好像句意有点奇怪。
【1】Planes, helicopters【名词短语】// used to fight the fire【后置定语】//.【“used to fight the fire”为过去分词短语作后置定语修饰前面名词planes, helicopters】
【2】Planes, helicopters【which are 省略了】 used to fight the fire
【3】Planes, helicopters which are used to fight the fire.【“which are used to fight the fire ”为定语从句作后置定语修饰前面名词planes, helicopters】
Planes, helicopters//【名词短语】 //which are used to fight the fire【后置定语】.
【备注:以上逗号相当于连词“and” Planes , helicopters= Planes and helicopters飞机和直升飞机】
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