"would rather"后面应该跟 do。例如：
1. I would rather do it myself.
2. She would rather not go out in the rain.
3. They would rather play football than stay at home.
在"would rather"后面，动词使用原形，这是英语中的一种常见用法。此外，"would rather"后面也可以接"not do"来表示否定意义，例如：
1. I would rather not tell him the truth.
在某些情况下，"would rather"后面也可以接从句，从句中的谓语动词通常使用虚拟语气，例如：
1. I would rather that he stayed with us.
综上所述，"would rather"后面跟"do"是最常见的用法，也可以接"not do"表示否定，接从句时谓语动词使用虚拟语气。