Iknow how to use past models could and had to. complete the sentences with could and had to. например: by the time mozart was four he could play the violin. 1)marie/do chores/yesterday (had to) 2)bobby/study english /last night (not have to) 3)the khights/pull the sword /out of the stone (could not). 4)john/ride a bike /when he was three (could not )