I‘m not happy.How can I do?还是What can I do?

问题描述:

I‘m not happy.How can I do?还是What can I do?

What can I do?为什么?习惯用法。从语法上说:do是及物动词,what 充当 do 的宾语。所以 What can I do?如果用 how 的话,要加宾语,How can I do it / that ?