I don't know.Do it how can i

I don't know.Do it how can i
I don't know.Do it how can i

I don't know.Do it how can i
我不知道.我应该怎样才能做到这一点?

似乎这句话有点问题。
应该是Do it how can I? 为什么我能干这个
或者 Do it how should I?为什么我要干这个