"Él no ha comido hoy."
Translation:He has not eaten today.
I was wondering why there was not a theory section and not really sure what I would be learning in this section. Good reference article regarding present perfect tense here http://www.studyspanish.com/lessons/presperfect.htm
Was helpful to me!
The form is called perfect present, but its meaning is continuous past. Something that occurred in the past but has continual relevance up to the present.