Whatever he has done, I have done

Question

Cualquier cosa que ha hecho, yo he hecho.

Or maybe "Cualquiera que ha hecho, también yo he hecho."

If someone could remind me of the difference between Cualquier cosa and Cualquiera and then talk about how this is wrong or right, right on.

Gracias.

Context: He killed a bunch of people, his girlfriend was blinded by love so she went along with his murderous plans not knowing all about what going on. When he gets caught she sees her error, Whatever he has done, I have done. I am to blame as much as he is.

Answer 1

Todo lo que haya hecho él, lo he hecho yo.

We use subjunctive here, it is not clear what he has actually done, especially not to her.

Here you would really need the subject pronoun to say, all that he (not others!) did, I did (nobody else but me).

You can use cualquier

cualquier cosa que ...

Kiwi is right though, todo is more idiomatic, good job Kiwi

Answer 2

Cualqiera vs cualquier cosa

The form cualquier is used only before the modified noun and only within its containing noun phrase. In other positions, the form cualquiera is used instead. cualquier cosa — “whatever thing” una cosa cualquiera — “whatever thing”

Answer 3

How about just using todo?

Todo lo que ha hecho, lo he hecho.

cualquier before cosa is an adjective and it is acopopated - I hope that's the right word lol anyway it means that the a is dropped, where as cualquiera is a pronoun and it stands alone.