1.I can...和Can you...后都加动词原形.因为can是情态动词.2.had better do sth .3.have fun doing sth=enjoy doing sth4.Do/Would you mind doing sth?5.finish doing sth 6.would like to do sth= want to do sth7...
like doing 表示经常做的 like to do 偶尔做的事情 tell sb. to do sth. 告诉某人做某事 help sb.to do sth.=help sb. do sth.帮助某人做某事 hope to do sth. 希望做某事 need to do sth. 需要做某事 have to do sth. 不得不做某事