"我喜欢游泳"是 I enjoy swimming，不是 I enjoy to swim。enjoy 后面必须接 doing，这是死规矩。
后面只接 doing 的动词
- enjoy doing 喜欢做
- finish doing 做完
- mind doing 介意
- practice doing 练习
- suggest doing 建议
- avoid doing 避免
- keep doing 一直做
- give up doing 放弃
- be busy doing 忙着做
介词后面一律 doing
前面是介词（in / on / at / about / of / for / without），后面动词加 ing：
- good at swimming，interested in reading
- thank you for coming，without asking
一组意思相反的坑
- stop to do：停下手头事去做另一件事
He stopped to smoke. 他停下开始抽烟。
- stop doing：停下正在做的事
He stopped smoking. 他戒烟了。
类似的还有 remember to do（记得要做）vs remember doing（记得做过）。
口诀：enjoy finish mind practice，介词后面都加 ing；stop to 和 stop doing，意思反过来要分清。
