before .. / mae ni

to explain something what we do or done before something, we can use mae ni (前に), this expression used to explain V1 before v2. see the example below :

寝る　前に　ドアを閉めなさい。
neru maeni doa wo simenasai.
Closed the door before going to bed.

私は日本へ来る前に少し日本語を　勉強しました。
watashi wa, nihon e kuru maeni sukoshi nihongo wo benkyoushimasita.
I have learned Japanese for a little, Before I came to Japan.

昨日会社に行く前に　銀行　に　行った。
kinou kaisya ni iku maeni ginkou ni itta.
yerterday i went to bank before went to office.

now let's try make your own sentence.
ganbatte!!

vocabulary
日本 = nihon = japan
会社　= kaisya = company, office, depend on sentence
寝る = neru = sleep
来る　= kuru = come
勉強する　= benkyou suru = to learn, to study.