Ik eet ontbijt, nadat ik ben opgestaan.
English: I eat breakfast after I have gotten up.
'Nadat' is a Dutch conjunction used to connect two actions, where one action happens after another. It introduces a subordinate clause (bijzin) that explains what happened first.
Use 'nadat' in Dutch when you want to say that one action happens only after another action has finished. It's common when describing sequences of events in the past or present.
Ik eet ontbijt, nadat ik ben opgestaan.
English: I eat breakfast after I have gotten up.
We gaan wandelen, nadat het heeft geregend.
English: We go for a walk after it has rained.
Zij belt mij, nadat ze thuis is gekomen.
English: She calls me after she has come home.
Nadat ik mijn huiswerk heb gemaakt, kijk ik tv.
English: After I have done my homework, I watch TV.