有关prefer的问题prefer to do sth.rather than do sth.和 refer to do

有关prefer的问题
prefer to do sth.rather than do sth.和 refer to do sth.rather than doing sth 的区分
八.prefer to do sth.rather than do sth.
These workers prefered to work extra hours at night rather than leave the work until the next week.这些工人宁愿加班干,也不愿把工作留到下一个星期.
九.prefer to do sth.rather than doing sth.
They prefer to join in the celebrations rather than going on a visit to the Palace Museum.他们宁愿参加庆祝活动而不愿参观故宫.