What I can do is to keep working hard为什么要用what啊?

What I can do is to wish you only to do what i can do What I can do is to keep working hard为什么要用what啊? what can i do to fight pollutiony 句子what I can do is to study hard.为什么要有to? What i want to do?What can i do?What i want to get? how to do,what to do,what i can do的用法how to do,what to do,what i can do怎么使用? 英语翻译译成：what can I do to satisfy you?如果可以的话,请分析一下句子成分.译成：what can I do is to satisfy you?如果可以的话,what can I do在这里是主语从句吗? what can I do what can I do what can I do? what can i do what can we do when there is nothing to do? To my want,I can't do anything.I can do what ,who can tell me? Helpless...I'm so sorry...I want to ...but cry is just the perferance of weakness...what can i do I want to be a superman, what can i do? I can do()I want to doA,what B.how what can I do to make it up to you