1、to do结构 afford to do 负担得起做某事 agree to do 同意做某事 arrange to do 安排做某事 ask to do sth. 要求做某事 beg to do sth. 请求做某事 care to do sth. 想要做某事 choose to do 决定做某事 decide to do 决定做某事 demand to do 要求做某事 determine to do 决心做某事 expect to do 期待做某事 fear to do sth. 害怕做某事 help to do sth. 帮助做某事 hope to do sth. 希望做某事 learn to do sth. 学习做某事