Then, perhaps, one present goes out while we select some object, about which he asks questions until he discovers it.
Helpu min porti tiujn ĉi kestojn en mian fiakron = Help me to carry these trunks to (into) my cab.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tiujn" in a variety of sentences. We hope that you will now be able to make sentences using this word.