부사절과 주절의 주어가 동일 한 경우
while, after, before, because 등의 부사절의 주어 생략 가능
because 절 축약시 주어 + because 도 반드시 생략!
After helping with the housework, the children did their homework.
The employees learned the process of production (while) assembling new products.
The bank has been attracting more customers since expanding its business.
He double-checked the price list before attaching it to the e-mail.
The workers tried to negotiate before protesting against poor working conditions.
help 목적어 with
고객 유치 (attract customers)