现在，有些子女虽然已经成家，却还住在父母家白吃白喝。

[误] Nowadays, some young people still stay at their parents\' home eating and drinking free, even after having their own families.

[正] Nowadays, some young people are still freeloaders at their parents\' home, even after having their own families.

注：freeloader 指“利用别人的慷慨占便宜的人”或“寄生虫”，用在这里十分准确和地道。