Estoy demasiado cansada para hacer algo hoy.

English Translation

I’m too tired to do anything today.

Would it be OK to use nada instead of algo?

I guess you can say whatever you want. It’s not grammatically incorrect but when you change algo por nada is a bit strange to my ears as I expect that algo to be changed for another algo instead of nada.

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It was “anything” that gave me the idea, but if it sounds strange to you, it was probably not a good idea. :slight_smile:

But if I’m too tired to do anything at all, I hope saying “absolutamente nada” wouldn’t sound strange, would it?