什么是to be 结构?

什么是to be 结构?

to be 句型是指动词不定式中将动词替换成be动词,表作为，例如I hope to be a teacher in the future.to do句型是极为普通的不定式句型。不定式句型的介绍一、作主语【句型结构】 It + be + adj.+ for(of) +sb. + to do sth.(that-clause).【语法描述】 不定式作主语时，往往用 it作形式主语，而把不定式放在谓语动词之后。【常用形容词】 important, necessary, natural, easy, safe, common, normal, hard, difficult, dangerous, unusual, impossible, bad, brave, careless, clever, nice, polite, wrong, kind, lazy, good, honest, etc.【举例说明】 In China it is rather common to have only one child for one family. 在中国，一个家庭只有一个孩子是很平常的事。It is impolite of you to say that to your mother. 你对妈妈说那样的话是不礼貌的。二、作宾语【句型结构】 S + V + to do sth.【语法描述】 某些动词只能带动词不定式作宾语，不定式所表示的动作往往在这些动词所表示的动作之后发生。【常用动词】 afford, arrange, ask, attempt, agree, care, choose, demand, decide, determine, expect, fail, hope, long, manage, offer, plan, prepare, pretend, promise, refuse, seek, want, wish, desire, etc.【举例说明】 They managed to escaped to South America. 他们设法逃到了南美洲。We are planning to have an English evening party next week. 我们计划下周举行一个英语晚会。He agreed to go there with me after school. 他同意放学后跟我一起去那里。三、作宾语补足语【句型结构一】 S + V + O + to do sth.【语法描述】 某些动词可以跟带 to的不定式作宾语补足语，以说明宾语将要执行的动作内容。【常用动词】 advise, allow, ask, beg, cause, wish, request, reach, consider,encourage, expect, forbid, force, get, help, inspire, invite, like, order, permit, persuade, prepare, need, remind, require, tell, want, warn, etc.【举例说明】 He warned every child not to touch the medicine on the table. 他警告每一个孩子不要动桌子上的药。Father encouraged me to study English well. 父亲鼓励我要努力学好外语。【句型结构二】 S + V + O + do sth.【语法描述】 感官动词和役使动词后常跟不带 to的不定式作宾语，但这种结构在变成被动语态时要加上to。【常用动词】 see, look at, watch, observe, notice, hear, listen to, make, have, etc.【举例说明】 Last night I saw him play the violin with his eyes shut. 昨天晚上我看见他闭着眼拉小提琴。Though he had often made his little sister cry, today he was made to cry by his little sister. 尽管他经常把他妹妹弄哭，但是今天他却被他的妹妹弄哭了。四、作定语【句型结构一】 N + to do【语法描述】 动词不定式和它所修饰的名词之间构成逻辑上的主谓关系,往往表示“未做”、“要做”的意思。【举例说明】 The meeting to take place here next year in China is sure to be a great success. 明年将在中国举行的会议肯定会是一个成功的会议。A man not to learn from others can't make much progress. 不向别人学习的人是不能取得很大进步的。【句型结构二】 N + to be done(to do)【语法描述】 动词不定式和它所修饰的名词之间构成逻辑上的动宾关系，此时一般用不定式的被动式;若句中有一名词或代词，实际上是不定式动作的执行者时，不定式则常用主动形式表示被动意义。【举例说明】 Is this the problem to be discussed at the meeting next week? 这就是在下周的会议上要讨论的问题吗？There will be more than three hundred scientists attending the meeting to be held the day after tomorrow. 有三百多位科学家将参加在后天举行的会议。The nurse has five children to look after. 这个护士要照顾五个孩子。【句型结构三】 N + to do【语法描述】 在这种结构中，名词往往表示动词不定式所表示的动作发生的时间、地点等，它们之间构成逻辑上的动状关系。【举例说明】 Years of hard work, little food, only a cold room to live in and never, never amoment to rest. 数年的艰苦劳动，食不裹腹，寒室一间，从来也没有片刻的休息时间。Yesterday I bought a big wooden box to put all my books in. 昨天我买了个放书的大木头盒子。五、作状语【句型结构】 to/ in order to / so as to + do sth.【语法描述】动词不定式作状语可以表示目的、原因、结果和方式等。【举例说明】 I went to the store to (in order to, so as to) buy a birthday present for my mother.我去商店给妈妈买了个生日礼物。 (表目的)We jumped with joy to hear the good news. 我们听到这个好消息高兴地跳了起来。(表原因)