I don't understand
En realidad no comprendo esta parte.
I don't really understand this part.
I don't understand French very well.
No comprendo el significado exacto de esa frase.
I don't understand the exact meaning of that phrase.
No comprendo lo que ella precisamente quiere.
I don't understand exactly what she wants.
No comprendo por qué ha hecho eso.
I don't understand why he did that.
No comprendo cómo el marido le dio el divorcio.
I don't understand how her husband gave her the divorce.
— La dolce vita (1960)
I don't understand this.
No comprendo muy bien el plan que presentaron.
I don't really understand the plan they presented.