What is definition of past dubious continuous tense?

What factors motivated Western expansion especially from the late 1800s onwards? What are some pros and cons of westward expansion? When was civony invented? What happened in the peoples crusade? What is an eastern potentate? The Renaissance was a cultural change in Europe beginning in the 1300s? What civilizations made contribution during the Renaissance? What diagram shows how the completion of the transcontinental railroad contributed to the closing of the western frontier? Cause of crusades? Is doncaster a roman army settlement? Are the Middle Ages the same as the stone ages? How did the western cordillera begin to form? What groups today use the same methods as the plebeians did? Ce zodie sunt eu? Who was the ancient roman god of slaves? What year did slavery in Canada start? Who is Paelen in Roman mythology? Why did women in ancient rome dye their hair? Which of the following is true of the roman empire and and the roman catholic church in medieval Europe? What does optimus maximus mean?