1、be + forced/compelled/obliged + to + V (不得不...)
例句:Since the examination is around the corner, I am compelled to give up doing sports.
既然考试迫在眉睫,我不得不放弃做运动。
2、Those who ~~~ (...的人...)
例句:Those who violate traffic regulations should be punished.
违反交通规定的人应该受处罚。