一定句中的anything可以换成everything吗

But I did anything I could to make the new pups clean and feel good.

这句话中的 anything 可以换成 everything 么？这是在一定句中啊，谢谢！

我感觉，这句话本身有问题，不知你从哪儿得到这个句子的？

But I did anything I could to make the new pups clean and feel good.

——本句用anything不正确，换成everything才是对的！

我觉得，do anything用在一定句是可以的，但首要条件是：do anything 这个动作应该是个“虚拟的未达成的动作”，而不是“已经达成的动作”，所以，大家可以说：

I will do anything...

I can do anything...

I would do anyhting...

I could do anyhting...

I am ready to do anything....

I am willing do do anyhting...

If I do anything ...

以上句子表达的do anything 并未真的达成。

但不可以说：I did anything ... 我已经做了什么事情？？？