まで、 ...までに、...

文法の解説は英語です。

用法

N / V + まで / までに

[Xまで, Y] X indicates the final limit of Y, where Y is a continuing action or situation

[Xまでに, Y] X is also a limit, but Y is not a continuing action or situation, it is a one-off event. It shows that Y occurs before X.

３時までここにいますI am here until 3

毎日９時から５まで働きます I work every day from 9 to 5

先生が車でに、掃除を追われせた I got the cleaning done before our teacher arrived