(At present), parents (play an important part in) teaching their children how to do the homework, (such as) to solve math problems, make sentences, read aloud English, write a composition, and so on. They seem to be entirely tutors. They have to (make full use of) their free time after work to help their children with their studies. This kind of question never (came up) when they were students. This is (because of) the fact that the teachers are too busy to give their pupils more help after school, (even) in school (of) the day.
回译：当前,家长在教子女如何做家庭作业方面起着重要作用,诸如教他们解数学题、造句、朗读英语、写作文,等等.他们似乎完全成了家庭教师.他们得充分利用下班后的空闲时间帮助子女学习.在他们还是学生的时候,这类问题从不曾发生过.这是因为老师太忙而不能在下学以后,给学生以更多的帮助,甚至于白天上学期间也是如此.