He d______ to study hard but he has no action,so he can't change the result.

问题描述:

He d______ to study hard but he has no action,so he can't change the result.
是写decides 还是decided?

decides,因为后面用的是一般现在是,主句应与从句保持一致.不用加s吗?……刚刚我忘记加了,刚刚修改了回答...