对下列句子划线部分提问

问题描述:

对下列句子划线部分提问
The children (ran out of their pocket money)划线部分 to hep the sick kid.
What did the children do to help the sick kid?
为什么用what而不用how 提问

如果用how的话就是
How did the children do to help the sick kid?显然不对.
因为how不能做宾语
而用what就对了,这里what做do的宾语,就是do what.这样才对.
如果要用how提问的话应该是这样的:
How did the children help th sick kid?
用了how就不能同时把do保留着.