Estis la unua-taga laboro = it was the first day's work.
Mi volus, ke tiu laboro estu finita hodiaĆ vespere = I should like that work (to be) finished this evening.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "laboro" in a variety of sentences. We hope that you will now be able to make sentences using this word.