一、to do结构 1. agree to do 同意做某事 2. want to do 想要做某事 3. wish to do 希望做某事 4. ask to do 要求做某事 5. refuse to do 拒绝做某事 6. aim to do 打算做某事 7. fail to do 未能做某事 8. long to do 渴望做某事 9. beg to do 请求做某事 10.care to do 想要做某事 11.offer to do 主动提出做 12.fear to do 害怕做某事 13.help to do 帮助做某事 14.hope to do 希望做某事 15.learn to do 学习做某事 16.plan to do 计划做某事 17.choose to do 决定做某事 18.decide to do 决定做某事 19.expect to do 期待做某事 20.pretend to do 假装做某事 21.promise to do 答应做某事 22.arrange to do 安排做某事 23.demand to do 要求做某事 24.afford to do 负担得起做 25.manage to do 设法做某事 26.prepare to do 准备做某事 27.determine to do 决心做.. 28.happen to do 碰巧做某事 29.hesitate to do 犹豫做某事 30.struggle to do 努力做某事