英语问题定语从句thedoctordidalltosavethewoundedboy.A.whathecouldB.hecouldC.everythingwhichhecouldD.forwhichhecoulddo.这里答案是选B.但是all在后面的从句中应该是做宾语成分,但是把all放到从句

Question

英语问题定语从句
the doctor did all_____to save the wounded boy.
A.what he could B.he could C.everything which he could D.for which he could do.
这里答案是选B.但是all 在后面的从句中应该是做宾语成分,但是把all放到从句中却不通顺.he could all to save the wounded boy.是不是少了个do
三楼的do 可以省略的吗？

Answer 1

the doctor did all (that)he could (do) to save the wounded boy.完整的句子应该是这样的,先行词是all,that引导了后面的定语从句(that)he could (do),这里that只是起引导作用不充当任何成分,可以省略,生硬点翻译就是医生做了一切他能做的挽救受伤男孩 .后面的do省略了是为了避免与前面的did（做）重复.至于to.就是表示目的啦.
这句话就等同于the doctor did what he could to save the wounded boy.
could 后面的do习惯都是省略掉的,因为与前面的实义动词意思完全一样,这里的省略主要是为了避免重复.