Mi eliris el la domo ĝuste kiam li eniris en la veturilon = I went out of the house just as (when) he entered the carriage.
Li iris tra la amaso, kaj eniris en la domon = He went through the crowd and entered the house.
Li eniris en la ĉambron = He entered (into) the room.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "eniris" in a variety of sentences. We hope that you will now be able to make sentences using this word.