Not only would it jeopardize a nation's futher development, but also it hinders young people's personal improvement.

请教老师，句中would 表示委婉，所以不用will？后半句谓语是否需要和前半句谓语保持一致，即：Not only would it jeopardize a nation's futher development, but also it (would) hinder yong people's personal improvement. 但是，would 可以省略？

谢谢老师。