While driving to campus, I had an accident.
Jessica made an appointment with a tutor because she needed help with the essay draft.
After publishing his essay in the newspaper, Vargas founded an organization called Defin American.
As the teacher explained the grammar, the students fell asleep.
Since January 1 is a federal holiday, the campus will be closed.
Original: While I was driving to campus I had an accident.
Revised: While driving to campus, I had an accident.
Explanation: The conjunction "while" establishes the temporal relationship, and by removing the unnecessary "I was," we create a more concise sentence.
Original: Because Jessica needed help with the essay draft she made an appointment with a tutor.
Revised: Jessica made an appointment with a tutor because she needed help with the essay draft.