Reduction of Adverb Clauses

Before they started the game, the players listened to the national anthem and saluted the flag.

When I backed into the driveway, I saw a large brown bear by my front door.

After the students had taken the 100 question multiple-choice exam, they leave the class early.

Before I left on my vacation, I took my pets to my neighbor who will look after them.

Since he left his house, Tom has not talked to his parents for more than 6 months.

When the movie started, most spectators turned their cell phones off.

Because the students were unprepared for their exam, they asked their professor for a delay.

Because most students used group chat to share answers during the test, they failed the test.

While I was watching the television, I was grilling the steaks.

Since she completed her undergraduate studies, she now wants to be cast in a new movie.

While we were camping in the Gran Canyon, my other friends spent the night in Las Vegas.

After my friend went shopping at Plaza Mazari in Reforma, she went to my house for dinner.