高中英语不定式？在高中英语语法中，动词不定式就像语言的无声舞者，虽非谓语中心，却在句子中扮演着多样的角色。它由"to"与动词原形结合，有时省略"to"，展现了丰富的形式和用途。形式与角色
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动词不定式用法举要
·动词不定式的语法功能
动词不定式可以在句子中作除谓语之外的几乎所有成分，即可在不同的句子中作主语、宾语、表语、定语、状语和宾语补足语。如：
To see is to believe. （主语）眼见为实，耳听为虚。 / 百闻不如一见。
Her job is to take care of the children in the kindergarten…… （表语）她的工作是在幼儿园照顾小孩。
The old woman hopes to travel to Hainan. （宾语）那老太太希望去海南旅游。
The doctor persuaded the patient to give up smoking . （宾语补足语）医生劝说这位病人戒烟。
Tom has a great deal of housework to do this weekend. （定语）这个周末汤姆有很多家务活要做。
Nice to see you again here. （状语）很高兴再次在这见到你。
不定式在句子中可做主语、宾语、表语、定语、状语和宾语
。
1)不定式做主语一般表示具体的某次动作。
【例如】
To complete the 30?storied building in one year was quite a difficult task.
To do that implies taking responsibility.
当主语较长，谓语较短时，常用it做
，而将不定式放到谓语的后面。
【例如】
It is important for modern young people to master at least two foreign languages.
It做
，不定式放在谓语动词之后常用于下列结构中：
a) It is＋形容词(easy, important, difficult, foolish, inconvenient, unnecessary, right, wrong...)＋( for/of sb.)＋不定式
【例如】
It is essential to reserve a table in advance of
.
It is hard to put my hopessintoswords.
It is not easy to catch fish with your hands only.
It is important for us young people to learn English and master it.
b) It is＋名词(a pleasure, a pity, a pleasant thing, one's du?ty, an honor, a shame, a crime, no easy job...)＋不定式
It is a sheer waste of time to read that kind of trash.
It is a pity to have to go without her.
It is a glorious death
the people.
c) It takes (sb.) some time (hours, months, days, a lot of time, patience...)＋不定式
It takes me three hours to learn English each day.
It took them half the night to get home in the snow.
2)不定式作表语不定式作表语常表示将来的动作，主语常常是表示意向、打算、计划的词，如wish, idea, task, purpose, duty, job等。
在语法中，动词不定式是指动词的一种不带词形变化从而不指示人称、数量、时态的形式。它之所以被叫做不定式，是因为动词不被限定，或者说不被词形变化所局限。不定式属于非谓语动词。以下是我为大家整理的不定式作主语的用法总结，希望能帮助大家更好地认识不定式，提高英语水平。
1) It's easy (for me) to do that.我做这事太容易了
easy,difficult, hard, important, possible, impossible,comfortable, necessary,
the first, the next,the last,the best,too much,too little,not enough, better;
It's so nice to hear your voice.
听到你的声音真高兴。
It's necessary for you to lock the car when you do not use it.
当你不用车的时候，锁车是有必要的。
2) It's very kind of you to help us.他帮助我们，他真好。
Kind,nice, stupid,rude, clever,foolish,thoughtful,thoughtless,brave,considerate(考虑周到的),silly, selfish(自私的)
例句:
It seemed selfish of him not to give them anything.他不给他们任何东西，这显得太自私了。
高中英语人教版必修一。
全称是“动词不定式”，是一种非限定动词，由不定式符号to+动词原形构成。不定式具有动词的特征，同时也有名词，形容词和副词的特征，但它还是属于动词，所以它本身可以带宾语和状语。动词不定式在句中可以作主语，宾语，表语，定语和状语，还可用在复合结构中，而且有完成式，进行式，完成进行式和否定形式。
不定式属于非谓语动词，它在句子中几乎可以做任何成分，就是不能做谓语。
具体的讲，可做主语、宾语、表语、定语、状语和宾语。
1. 动词不定式作主语：
To mast a language is not an easy thing.
To teach English is my favorite.
It's my pleasure to help you.
动词不定式作主语时可以放在后面，而用 it 作形式主语放在原主语的位置上。
It's very kind of you to have given us much help.
你给了我们那么多的帮助真是太好了。
It's necessary to find the witness. 有必要找到目击者。
2. 动词不定式作宾语：
某些及物动词可以用动词不定式作宾语，这些动词有decide, begin, help, begin, want, wish,like, forget, learn, ask.
What I wish is to learn English well.
I like to help others if I can.
3. 动词不定式作宾语补语 。
以上就是高中英语不定式的全部内容，·动词不定式的省略 1 .省略不定式的符号 to.动词不定式作 see， look at， watch， notice， observe， feel 等感官动词以及 have， let， make 等使役动词后面的宾语补足语时，不定式的符号 to 要省略。如：I often hear my neighbor sing English songs 我经常听到我邻居唱英文歌。
