story: Larry was trying to finish his book report before school. He wasn't done writing when the bus drove up. On the bus he continued working and didn't talk to his friends. With some difficulty he was even writing while walking up to the door. He put down the last period just as he entered the classroom.
 selected sentence: With some difficulty he was even writing while walking up to the door.
Larry writes as he walks to the classroom >Causes/Enables> Larry finishes before he enters the room