第三人称单数,动词要加S
进行时 动词后要加ing
like,love ,dislike,hate 后面动词也要加ing
spend some time(money) doing sth
practise doing sth.
look forward to doing sth.
thank sb.for doing
be good at doing
be ready for doing
介词后面动词要加ing
初一好像就这些,我也是读初一的,想不起来其他的了