This is the 15503rd most frequent Turkish word.
tamamladıklarını
"The things that they have completed."
The word 'tamamladıklarını' here refers to the act of completing tasks as reported in the accusative form referring back to tasks completed by the team members.
Proje yönetim sürecinde, takım üyeleri görevlerini tamamladıklarını bildirdiler.
During the project management process, team members reported having completed their tasks.
In this sentence, 'tamamladıklarını' depicts the completion of homework, represented in a statement form referring to the act.
Öğrenciler ödevlerini tamamladıklarını öğretmene gösterdiler.
The students showed the teacher that they had completed their homework.
Here, 'tamamladıklarını' is used to convey that the experimental results have been finalized, emphasizing the completion in a reported manner.