"Sé que mi español es malo pero me entiendes"
Comprende is the how you would say understand. Also entiende.
No entiendes esto?
no lo entenderías
"él no entiende" (he doesnt understand) or "él no puede entender" (he can not understand)
Mal
I'm bad = soy malo
Dog is 'perro' and bad is 'malo' so I guess 'perro malo' or maybe 'malo perro'. A computer translator gave me 'mún perro' but either I don't understand enough Spanish or that's not right.
There are two ways that you can say "too bad" in Spanish, lástima or ¡qué pena!
just say i dont understand
comprensión total
Entiendo lo que hablas y comprendo perfectamente en espanol = I understand/hear what you are saying and understand perfectly in Spanish Usted sabe/tu sabes exactamente lo de que hablo y entiende/entiendes perfectamente = You know exactly what I am talking about and understand perfectly. (Formal/informal).
"Mal" in Spanish means "bad". In Spanish it is pronounced "mahl".