您好，动词不定式应该是非谓语动词中最麻烦的，因为动词不定式除了无法充当（谓语）以外，可以用来充当几乎所有的其他成分，比如动词不定式可以用来充当主语、宾语、表语、状语、定语，还能充当补语使用，所以掌握动词不定式的用法并没有一定的公式，需要和现在分词和过去分词一起学习才有个比较：
1）充当（主语）
To do or not to do is a questions every one asks all the time.
（做还是不做是每个人一直在问的问题。）
To be a teacher is my dream.
（当一名老师是我的梦想。）
2）充当（宾语）
I want to buy a new jacket.
（我想买一件新夹克。）
I find it difficult to do Maths.
（我觉得做数学很难。）【it 为形式宾语， to do Maths 是真正的宾语。】
There is nothing we can do but report to the police.
（我们无能为力，只能向警方报告。）【作介词 but 的宾语，to 省略】
I am sorry to tell you that he is ill.
（我很遗憾地告诉你，他生病了。）【作形容词 sorry 的宾语】
This problem is difficult to solve.
（这个问题很难解决）【作形容词 difficult 的宾语，主语为动词不定式的逻辑主语】
3）充当（表语）
This is to be done tomorrow.
（这将在明天完成。）
The purpose of this thesis is to focus on social issues.
（本论文的目的是关注社会问题。）
4）充当（定语）
There is nothing to eat.
（没有什么可吃的。）【to eat 充当后置定语，修饰 nothing】
Do you have anything to say to me?
（你有什么要对我说的吗？）【to say 充当后置定语，修饰 anything】
5）充当（状语）
To go to Peking University, you need to do your best.
（要去北京大学，你需要全力以赴。）【不定式充当（目的状语），也就是全力以赴的目的】
He returned home to find his house broken in.
（他回到家，发现他的房子被闯入了。）【不定式充当（结果状语），也就是回到家的结果】
We are proud to be living in China.
（我们很自豪能生活在中国。）【不定式充当（原因状语），也就是自豪的原因】
He waved his hand as if to hire a taxi.
（他挥了挥手，好像要叫一辆出租车。）【不定式充当（方式状语）】
You would be a fool to refuse the money.
（拒绝这笔钱就是傻瓜。）【不定式充当（条件状语），= if you were to refuse the money, you would be a fool】
6）充当（补语）
The school considers him to be the Best Student of the Year.
（学校认为他是年度最佳学生。）【不定式充当宾补，补充说明 him】
We are not allowed to touch the exhibits.
（我们不允许触摸展品。）【不定式充当主补，补充说明 we】
所以可以看得出（动词不定式）在句子的7种主要成分中，除了谓语动词无法替代以外，其余的6种成分都可以拿来替代的，是最复杂的非谓语动词，学习起来也是最为麻烦的一个。
希望这样的分析可以帮到您。
给你又附了一张非常清楚的表，可以看看，词很多
【V+(sb) do sth】
make sb do sth
have sb do sth
let sb do sth
help sb （to） do sth
see sb do（doing） sth
注意全过程notice do
注意某一个时刻notice doing
hear sb do(to常去掉)sth.意思是听到某人做某事,强调状态，强调此人一直在做事，而hear sb. doing sth.则强调此人正在做某事，强调动作。
【V+(sb) to do sth】
这个实在是太多太多了，基本上除了特殊记+原型和doing的基本都是to do 用法
常用的有
try/get/remeber/forget/continue/stop/want/wish/hope/used...to do sth
其他
enable,cause, consider, suppose, dare, reveal, show, prepare, proclaim, report, judge, prove, love, prefer, trust, believe, help, teach, train, remind, forbid, admit, allow, permit等等。
通常只接不定式(而不是动名词)作宾语的动词有： afford 负担得起 agree 同意 arrange 安排 ask 要求 care 想要 choose 决定 decide 决定 demand 要求 determine 决心 expect 期待 fail 未能 hesitate 犹豫 hope 希望 long 渴望 manage 设法 offer 主动提出 plan 计划 prepare 准备 pretend 假装 promise 答应 refuse 拒绝
acknowledge admit anticipate appreciate avoid consider delay deny dislike enjoy escape excuse ensure fancy involve mind postpone quit recommend resist suggest等。
【V+(sb)/(for)/(from) doing sth】
+doing固定搭配
try/remember/forget/continue/stop...doing sth
finish doing sth.
finish/mind/practise/enjoy/keep doing sth.
stop sb.from doing
look forward to doing sth
like doing
feel like doing
give up doing
can’t help doing
be/get used to doing
be busy doing
be worth doing
have fun/problems/troubles doing
give one’s life to doing
make a contribution to doing
What/How about doing?
be good at doing
物+need+doing
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常见动词有：allow，permit，forbid，advise，suggest(建议）等，其共同特点是：
allow/permit/forbid/advise/suggest doing sth(接v-ing做宾语）
allow/permit/forbid/advise sb to sth(接代to不定式做宾补）
【V + sb from doing sth】
ban sb from doing sth：禁止某人做某事
He was banned from the meeting.他被取消了参加会议的资格。
He was banned from driving for six months.
She`s been banned from leaving Greece.
2. discourage sb from doing sth：
1)阻拦；劝阻
His parents tried to discourage him from being an actor.
2)使灰心；使泄气；使丧失信心
The weather discouraged most people from attending（出席）.
3. deter sb from sth / doing sth 阻止，使不敢
The high price of the service could deter people from seeking advice.
这么高得服务费可能使咨询者望而却步。
4. keep sb（from）doing sth：
1）阻止某人做某事
The church bell kept her from sleeping.
2）忍住；克制自己不做某事
She could hardly keep from laughing.
I juge managed to keep myself from falling.我差一点儿没摔倒。
5. prevent sb (from) doing sth：g阻止某人做某事；阻挠。
He is prevented by law from holding a licence.按法律规定，他不得持有执照。
Nothing would prevented him from speaking out against further injustice.什么也不能阻止他鸣不平。
6. stop sb (from) doing sth：阻止某人做某事；阻挠。
There is nothing to stop you from accepting the offer.
You cannot stop people from saying what they think.
【可以同时用】
一般来讲，to do sth是没做的事情doing sth已经做的事情
像stop、continue、remember、forget一类的词，stop to do sth是停下来去做另一件事情，stop doing是停下来你正在做的事情；continue doing sth是继续作某事，continue to do sth是继续作另一件事情...总之理解了的话就可以以此类推
欲做某事用like to do，一直喜欢做某事用like doing
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五星级回答，一定要采纳哦，不要辜负我的辛苦劳动！
【来自英语牛人团】