Japanese phrase
いつまでに終わらせますか？ i tsu ma de ni o wa ra se ma su ka
Meaning
By what time will you finish it?
When to use it
Asks for the time by which a person will finish something. It focuses on setting a clear deadline and sounds polite in everyday planning.
Example dialogue
明日の発表準備はいつまでに終わらせますか？ asu no hap pyō jun bi wa i tsu ma de ni o wa ra se ma su ka
By what time will you finish preparing for tomorrow's presentation?
今日中に終わらせます。 kon nichi chū ni o wa ra se ma su
I will finish it today.