have had / have breakfast

[Eris]

When do I need to use .

I have had breakfast with my parent.

I have breakfast at 9.00 am.

[Mister Micawber]

.
I have had breakfast with my mother/father/parents.-- Use this for a recent breakfast or a reason not to have a later breakfast with another person.

I have breakfast at 9.00 am.-- Use this to state your everyday habit.
.
_________________
Native English teacher at Mister Micawber's

[Sureshvemuri]

Can I use "I already had my breakfast" - to tell that I ate my breakfast.

[Mister Micawber]

.
Yes, you can. Many grammarians prefer the present perfect here: I've already had....
.
_________________
Native English teacher at Mister Micawber's

[Sureshvemuri]

Thank you Mister Micawber for your reply and time.

[Eris]

Thank you Mister Micawber ,

Now, I confidently use these sentences