题目内容：

they lived a hard life and were often made ___for over ten hours a day 此处为什么要填to work

优质解答

make sb do sth .THe boss made the employees to work over time .但用在主动句中时不加to 当用在被动句中时要加to 这是一个语法规则 如:the empoyees were made by the boss to work over time.