I wish后跟是不是一般虚拟语气,如I wish I could/would/should/might?

wish,would rather（sooner）后的虚拟语气
动词wish后的宾语从句,表示未实现的主观愿望.这类宾语从句的谓语动词用虚拟语气.例如：
I wish I knew both English and French．我要是既懂英文又懂法文就好了.
I wish I were as young as you．我要是像你一样年轻该多好.
动词wish如果是过去时态,后面的宾语从句中虚拟语气形式不变,仍用过去时、过去完成时和过去将来时.例如：
I wished I hadn't made that mistake．我当时多么希望没犯那个错误.