prefer to do sth.强调特定的或某次具体的动作,即在一定的场合下宁愿做什么. prefer doing sth.强调一般性倾向,即对某种行为的“偏爱”. eg.I prefer to sleep (at the moment).这个时间我宁愿睡觉（而不是做其他事）. I prefer sleeping (on Sunday mornings).周日早上我喜欢睡觉. 【补充】 ① prefer to do A rather than B ② prefer (doing) A to (doing) B
