加ing:like doing, remeber doing,forget doing,prefer doing to doing, look forward to doing sth.,be used to doing初中最常用6个：suggest doing,prastice doing,enjoy doing,finish doing,mind doing, keep doing加to do:like to do,want to do, get used to do.,used to do,determine to do,learn to do,expect to do,refuse to do, managed to do,pretend to do, promise to do, choose to do,was/were able to do加原形的太多了，不一一说了，一般剩下的都是加do的。好累啊，加点分吧~~