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Questions & Answers about shigoto ga kanryoushimashita.
Why is the particle が used after 仕事 here?
が marks 仕事 as the grammatical subject of the sentence.
So in 仕事が完了しました, the thing that became completed is the work/task.
A very literal breakdown is:
- 仕事 = work, job, task
- が = subject marker
- 完了しました = was completed / has completed
In natural English, we often say The work has been completed or The task is complete.
Japanese often uses が when introducing or identifying what has a certain state. Here, the state is completed.
Why is it 完了しました instead of 完了です?
完了しました uses the verb 完了する, which means to be completed / to complete depending on context.
So:
- 完了です = it is complete
- 完了しました = it has completed / it was completed
The version with しました sounds a bit more like the completion has happened, while 完了です sounds more like the current status is complete.
In many real situations, both can work, but the nuance is slightly different:
- 仕事が完了です → a status statement
- 仕事が完了しました → completion has occurred
The sentence you were given sounds like a formal announcement or status update.