疑问句可以做宾语吗（同时涉及could和would）

The question wasnt could he do it but why would it be worth doing?

不是非常懂这个句子的could和would，为何不可以将这两个删去呢？

could he do it 单独拿出来不是疑问句吗？

这个句子的标点符号有问题，以至于影响了网友的理解。现改正如下：

The question wasnt “Could he do it but why would it be worth doing?”

The question wasnt could he do it but why would it be worth doing?

加引号或黑体部分，是wasnt 的表语从句。该从句由两个并列分句组成，所以含有两个疑问句结构：could he do it...和 would it be...

【翻译】

1. 问题不是：“他能否做此事，而是此事为何值得去做？”

2. 不是他能否做此事，而是此事为何值得去做的问题。