While Jack was walking to class, he met his friend.
While walking to class, Jack met his friend.
Xinyi's computer broke down again after it had been fixed twice.
Xinyi's computer broke down again after being fixed twice.
Because I don't know his phone number, I can't call him.
Not knowing his phone number, I can't call him.
Before Ethan left for ESOL 120, he ate breakfast.
Before leaving for ESOL 120, Ethan ate breakfast.
Fiona likes to listen to music while she is reading her favorite books.
Fiona likes to listen to music while reading her favorite books.
Since I came to this city, I've lived in the same house
Since coming to this city, I've lived in the same house.
Because Leo was busy, he decided to skip lunch.
Being busy, Leo decided to skip lunch.
Since Juyoung had slept for 20 hours, she felt great.
Having slept for 20 hours, Juyoung felt great.
While Juyoung was going to class, she saw something unusual.
While going to class, Juyoung saw something unusual.
When Aleks was watching TV, he heard a knock at the door.
When watching TV, Aleks heard a knock at the door.
Because Taylor worked hard, she passed the test.
Having worked hard, Taylor passed the test.
Before Jack studied for the exam, he swam 10 miles.
Before studying for the exam, Jack swam 10 miles.
Before Yixuan went outside to play in the snow, she put on her coat and gloves.
Before going outside to play in the snow, Yixuan put on her coat and gloves.
Teacher Jessica feeds her dog before she goes to work.
Teacher Jessica feeds her dog before going to work.
I was reading your essay. I noticed many mistakes.
While reading your essay, I noticed many mistakes.