语法规则,单数第三人称动词原形的变形是要加s,进行时才用ing.
同时,like 后即可跟to do 也可跟doing,没有很明大的差异,但是用起来也有细微的差别.
like doing 一般表示习惯性的一直喜欢做的某种事情或活动,如：She likes swimming, and she swims every Saturday morning.
Like to do 则含有一定的主观意愿,表示这个时候想做什么事情了,而不是强调一种习惯性的喜好.如：She liked to go to swim, so I had to stay at home.