Pagkatapos is always followed by a NG phrase. This is the case even if the verb it is attached to is an Actor focus verb. Ex: "Pagkatapos kong kumain..." = "After I ate..." Kumain would usually take "ako" for "I" as the actor, but in this sentence it requires "ko" because it is attached to "pagkatapos."
Pagkatapos Example Sentences in Tagalog: (12)
I felt warm after drinking wine.
Today is the first day after the election.
Take a shower first and then come back here afterward.
After church we proceed to the mall.
I was hungry last night after studying.
This/Here is where the audience exits after the show.
After the operation, the dear was already able to hear.
Kinailanganni Richard namagpahingánangisángbuwánpagkataposniyángmagkasakít.
Richard needed to rest for a month after he got sick.
Are you already going to work right after college?
Are you still going to take further studies after college?