How to say how I do in Spanish?

Answer 1

'I (do), too' = yo tambien

The auxiliary verb 'do' only has sense in Spanish when connected with a main verb. For example:

(Do you) speak Spanish? = Hablas espanol?

Yes, I do (speak Spanish) = Si, hablo espanol

I (do), too = yo tambien

Answer 2

How to say How i do-

Cómo lo hago.

How to say I do-

Yo.