to do 通常后接动词不定式，即动词不带任何时态和人称变化的原型形式。

例如：- I want to eat.（我想吃。）- She decided to study abroad.（她决定出国留学。）- He plans to quit his job.（他计划辞职。）需要注意的是，有些动词后面只能接动名词形式，不能接动词不定式。这些动词包括：enjoy, finish, mind, practice, start, admit等。例如：- I enjoy reading books.（我喜欢读书。）- She finished her homework last night.（她昨晚完成了她的作业。）- Don't mind my asking, but...（不要介意我问，但是...）- He practices playing the piano every day.（他每天都练习弹钢琴。）- Let's start the meeting now.（我们现在开始开会。）- I'm sorry, but I can't admit that.（很抱歉，我不能承认那个。）