Questions & Answers about Έδωσα το μόσχευμα στο αφεντικό.
Έδωσα is the aorist tense, which here means I gave as a completed action.
- δίνω = I give / I am giving
- έδωσα = I gave
So this sentence is talking about a single completed act of giving, not an ongoing or habitual one.
The dictionary form is δίνω (to give).
This verb is a little irregular, so the aorist does not look very similar to the present:
- δίνω = I give
- έδωσα = I gave
This is something you mostly just have to learn as a verb pair.
Greek often leaves out subject pronouns when they are not needed.
The ending of Έδωσα already tells you the subject is I:
- -α in έδωσα = I
So Έδωσα το μόσχευμα στο αφεντικό already means I gave the graft/transplant to the boss, without needing εγώ.
You could add εγώ for emphasis, but it is not necessary:
- Εγώ έδωσα το μόσχευμα στο αφεντικό. = I gave the graft to the boss.