现对不定式、动名词和分词作表语的差异作剖析秒杀”，希望能给大家供应一些实用性帮助。
1、不定式作表语
1)不定式作表语一样平常表示详细或特定的动作，特殊是表示将来的动作。
Our plan is to finish the work next week.
我们的操持是下个星期完成这项事情。
You will have to work hard if you are to succeed.
要想有所作为，你必须苦干。
The time has come for action if these beautiful animals are to survive.
若要使这些俏丽的动物能生存下去，现在就要行动起来。
You are to report this to the police.
你该当报警。
We are here to provide the public with a service.
我们来这里是为公众做事。
They are to be married in June.
他们操持于六月份结婚。
Other less profitable services are to be axed later this year.
其他盈利较少的做事项目预定今年稍晚将大量减少。
His efforts to improve the situation are to be applauded.
他为改进状况所作的努力该当受到赞许。
The only thing I could do was to leave.
当时我所能做的唯一一件事便是离开。
She was to regret her words before the day was out.
她到不了入夜就会为自己说的话后悔。
She was to be here at 8.30 but she didn't arrive.
她该当在8:30到这里，但是没有到。
Driver fatigue was to blame for the accident.
这个事件是驾驶员疲倦所致。
Which driver was to blame for the accident?
哪位司机是这次事件的闹事者？
This advice was to prove valuable.
这忠言证明是有益的。
He was to regret that decision for the rest of his life.
他终生都将后悔作出了那一决定。
Her first impulse was to run away.
她的第一个动机便是逃走。
His aim was to unite Italy.
他的目标是统一意大利。
He was to address a public assembly on the issue.
他要对公众年夜众集会揭橥演说评论辩论这个问题。
The project is to go ahead following renewed promises of aid from the UN.
在得到联合国重申供应帮助的承诺往后，这个项目将动手进行。
Their purpose is to adjudicate disputes between employers and employees.
他们的目的是裁决店主与雇员之间的轇轕。
A local firm is to be preferred.
选一家当地的公司更好。
The production process is to be streamlined.
生产流程还需改进。
The college is to invest$ 2 million in a new conference hall.
这所学院操持投入200万元建造新的会议大厅。
Her sole object in life is to become a travel writer.
她人生的唯一目标便是当游记作家。
The object is to educate people about road safety.
目的便是教诲大众把稳交通安全。
The first rule is to make eye contact with your interviewer.
首先是眼睛要直视口试官。
The aim is to reduce traffic at peak periods.
目的是缓解高峰期间的交通状况。
The only course of action left to me was to notify her employer.
我可能采纳的唯一方法便是关照她的店主。
To do two things at a time is to do neither.--次做两件事即是未做。
What I would suggest is to start work at once.我的建议是急速开始干。
No student is to leave the room.
学生一律不许离开这房间。
His first act as leader was to purge the party of extremists.
他当上领导的第一件事便是打消党内的极度分子。
If we were to offer you more money, would you stay?
如果我们给你加钱，你乐意留下吗？
In general, the changes they had made were to be welcomed.
总的来说，他们所作的这些变动都会被欣然接管。
The photographs were to be included in his as yet unwritten autobiography.
这些照片准备要收入他那尚未写的自传。
2)如果主语是不定式(表示条件)，表语也是不定式(表示结果)。
To see is to believe.百闻不如一见。
To work means to earn a living.事情便是为了生活。
反之也然：
Seeing is believing. 百闻不如一见。
3)如果主语因此aim，duty，hope，idea，happiness，job，plan，problem，purpose，thing，wish等为中央的名词，或以what勾引的名词性从句，不定式作表语是对主语起补充解释浸染。
His wish is to buy a luxurious car in the near future.他的希望是在不远的将来买一辆豪华轿车。
The government's first duty is to defend the currency by stamping on inflation.
政府的紧张职责便是通过抑制通货膨胀来保持货币稳定。
Our duty is to hold ourselves responsible to the people.
我们的任务，是向公民卖力。
My duty is to look after the animals.
我的任务便是照看这些动物。
The idea is to encourage people to get to know their neighbours.
其目的是匆匆使人们结识邻居。
The idea is to spread social democracy and economics outwards from Europe.
其目的是将欧洲的社会民主与经济制度传播到天下各地。
The idea is to divide up the country into four sectors
该主见是将国家分成4个防区。
The idea is to get the jump on him.
想法是要赛过他。
The latest big idea is to make women more interested in sport.
最近的盛行思想是促进妇女对体育的兴趣。
2、当动词所表达的动作是指常常性的活动时，既可以用动名词作表语，也可以用不定式作表语。
Students' tasks are studying/to study.学生的任务是学习。
Today's tasks for students are to read学生们本日的任务是朗读。
My hobby is collecting stamps.
我的业余爱好是网络邮票。
Our work is serving the people.我们的事情是为公民做事。
My job was to chase up late replies.
我的事情是敦促迟迟不送回来的答复。
Her job was to drum up business.
她的事情是提高业务额。
My instinctive reaction was to deny everything.
我的本能反应是否认统统。
His only way of dealing with his problems was to go out and get drunk.
他办理烦苦处的唯一办法便是出去喝个烂醉。
My natural inclination is to find a compromise.
我生性易于妥协。
The principal effect of the demand for new houses was to inflate prices.
对新住宅需求的紧张结果是匆匆使价格上涨。
Her mission in life was to work with the homeless.
她以帮助无家可归者为己任。
My favourite pastime is reading.我最喜好的消遣是读书。
To know everything is to know nothing.
样样通，样样松。
Her philosophy of life is to take every opportunity that presents itself.
她的处世态度是不放过任何呈现面前的机会。
We figured the sensible thing to do was to wait.
我们认为，明智的做法是等待。
The college's aim is to help students achieve their aspirations.
大学的目标是帮助学生实现他们的抱负。
The club's aim is to foster better relations within the community.
俱乐部的宗旨是促进团体内部的关系。
Their overriding aim was to keep costs low.
他们的紧张目标是坚持低本钱。
The first law of kung fu is to defend yourself.
功夫的紧张原则是自卫。
Our priority is to educate people about the dangers of drugs.
我们首先要考虑的是教诲公民，使他们认识毒品的危险。
All you've achieved is to upset my parents.
你唯一做到的便是使我的父母难过。
3、分词作表语
分词做表语有两种情形，一种是现在分词做表语，一种是过去分词做表语，这两者差异是考试中常常考到的地方。一样平常来说，表示生理状态的动词如excite，interest等都是及物动词，汉语意思不是“激动”，“高兴”，而是“使激动”、的“使高兴”，因而现在分词该当是“令人激动的”、的“令人高兴的”，过去分词则是“感到激动的”和“感到高兴的”。以是，凡表示“令人……的”都是-ing形式，凡是表示“感到……”都用-ed形式。换句话说，若人对……感兴趣，便是somebody is interested in...,若人/物本身有兴趣时，便是说sb./sth. is interesting.这类词常见的有：
encouraging令人鼓舞的--encouraged感到鼓舞的
pleasing令人愉快的--pleased感到愉快的
puzzling令人费解的--puzzled感到费解的
satisfying令人满意的---satisfied感到满意的
surprising令人惊异的--surprised感到惊异的
worrying令人担心的--worried感到担心的
interesting使人感到高兴--interested感到高兴的
exciting令人激动的--excited感到激动的
delighting令人高兴的--delighted感到高兴的
disappointing令人失落望的--disappointed感到失落望的
Traveling is interesting but tiring.
旅行是有趣的，但是使人疲倦。
The pupils will get confused if they are made to learn too much.
如果要学生学得太多，他们会感到糊涂的。
The argument is very convincing.
他的论点很令人信服。
They were very excited at the news.
听到这个，他们非常激动。