Because the student had been close to someone who had the deadly Coronavirus, she was quarantined for two weeks.
Having been close to someone ...
Before starting the game, the players listened to the national anthem and saluted the flag.
Before the players started the game, they listened to the national anthem and saluted the flag.
Because she had finished her undergraduate studies, Maria decided to interview for a job as an intern for a politician in Washington D.C.
Having finished her undergraduate studies, Maria decided to interview for a job as an intern for a politician in Washington D.C.
Since Earth is approaching a population of 10 billion people, people must learn to recycle and to grow their own crops.
can´t be reduced
After taking the 150 question multiple-choice exam, the professor let the student leave the class early.
After the student had taken the 150 question ....
Since the workers finished the shift, they have been getting drunk at the local bar.
Since finishing the shift...
When the movie started, most spectators turned their cell phones off.
can not be reduced
Before she turned in her essay exam, Jane spent five minutes editing for grammar, sentence style, and word choice.
Before turning in her essay exam, Jane spent five minutes editing for grammar, sentence style, and word choice.
While we were camping in Big Bear City, my other friends spent the night in Las Vegas.
can not be reduced
After my friend went shopping at Victoria Gardens Mall in Fontana, she went to my house for dinner.
After shopping ...
Since he left work, Mohammed has been playing video games at home.
since leaving work ...
While ironing my shirt, my friend called me.
While I was ironing my shirt, my friend called me.
Since he left his house, Tom has not talked to his parents for more than 6 months.
Since leaving his house ...
While the massive fire approached the Oak Glen community, fire fighters used fixed wing aircraft and helicopters to drop water and flame retardant on the hot spots.
Can´t be reduced
Before Hank was able to play a game of basketball, he went through a series of stretches to warm up his muscles.
Before being ablee to play a game of basketball, Hank went through a series of stretches to warm up his muscles.
Because the students were unprepared for their exam, they asked their professor for a delay.
Being unprepared for their exam, the students asked their professor for a delay.
Having used group chat to share answers during the test, the professor decided to cancel the test scores.
Because most students used group chat ....
After I put up the Halloween decorations, I decided to go to Walmart to pick up some groceries.
After putting up the Halloween decorations, I decided to go to Walmart to pick up some groceries.
After Naif completed his research project, he presented his findings to the Education Graduate Committee.
Aftercompleting his research project, he presented his findings to the Education Graduate Committee.
Before I left on my vacation, I took my pets to my neighbor who will look after them.
Before leaving on my vacation, I took my pets to my neighbor who will look after them.
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