doing sth.或help sb.to do sth这类的固定搭配!.

enjoy doing sth 享受或喜欢做某事be busy doing sth 忙于做某事It`s+adj +to do sth 。做。是。的try doing 试着做某事ask sb。to do 叫某人做某事forget doing 忘记已经做过的事forget to do 忘记要做某事remember to do 记得要做某事(还没做过)remember doing 记得做过的事let sb do 让某人做某事make sb do 使某人做某事like doing sth 喜欢做某事(习惯上的)start to do sth 开始做某事start doing sth 开始做某事finish doing sth 完成。(一般现在时态）be doing 正在做。。。would like to do (表示意愿)spend。(in) doing sth 花费。做。。。look forward to doing sth 期待做某事want to do sth 想要做某事decide to do sth 决定。。。It takes sb sometime to do sth 花费某人多少时间做。。。be going to do sth/will do（一般将来时态）将要做某事Thank for doing sth