John did not want IMP to leave before/until Mary finished PRES DU SUBJ her paper.
Before/*Until the police arrived PRES DU SUBJ,] John decided PASSE COMP not to leave.
John hastened PASSE COMP to wash the dishes before Mary came back PRES DU SUBJ.
John quickly bought PASSE COMP a car before the prices rose PRES DU SUBJ.
The stone quickly fell PASSE COMP/hastened PASSE COMP to fall on the road before the car arrived PRES DU SUBJ.
I'm working PRES in the garden before it is PRES DU SUBJ too hot.
Mary is preparing PRES breakfast before the children get up PRES DU SUBJ.
She was preparing IMP breakfast before the children got up PRES DU SUBJ.
It was raining IMP before John woke up PRES DU SUBJ.
John did not leave PASSE COMP before/until Mary answered PRES DU SUBJ his question.