高中too和to句式用法详解

高中too和to句式用法详解（通用4篇）

高中too和to句式用法详解 篇1

to和too的区别：

一、意思不同

1.to意思：

prep. 对于;为了;(表示方向)到;向;(表示间接关系)给

adv. (表示方向)去;(门)关上

2.too意思：adv. 也;太;而且;很

二、用法不同

1.to用法：表示在某范围之外,两者之间可以互相连接,也可以不连接,可与表示“谈话”“交际”的词连用。to表示交际的`动作一般是单向的。

例句：

This will be a great boost to the economy.

这对于经济发展将是一个巨大的促进。

2.too用法：基本意思是“也”“还”“而且”,用于肯定句,否定句用either。too通常位于句末,其前的逗号可有可无,在书面语中,可位于句中,这时其前后一般应有逗号,在美式英语里,too可用于句首,其后必须有逗号。

例句：

I will go, provided that you go too.

你也去的话我就去。

三、侧重点不同

1.to侧重点：用于一般现在时或一般将来时。

2.too侧重点：用于一般将来时。

高中too和to句式用法详解 篇2

一、must的用法

1)表示主观的义务和必要, 主要用于肯定句和疑问句, 意思为 “必须……，得……，要……”;由must引起的疑问句，肯定回答要用must或have to, 否定回答要用needn’t或don’t have to, 意思是“不必”;must的否定形式mustn’t表示禁止，意思是“不能，不许”。如：

We must find a good method to learn computer well.

我们必须找一个学好电脑的方法。

―Must I finish the task right now?

我现在必须完成这个工作吗?

―Yes, you must. / Yes, you have to. 是的。

(―No, you needn’t. / No, you don’t have to. 不，不必。)

You mustn’t come here without permission. 未经允许，你不能来这儿。

2)表示肯定的猜测，常用于肯定句中，意思为 “一定是, 必然……”。

注意must表示推断或猜测的`几种情况:

Your sister must be a doctor in this hospital. (现在的猜测)

你姐姐一定是这家医院的医生。

He must be reading newspapers in the reading room now.

(正在进行的猜测)

他此刻一定正在阅览室读报。

It must have rained last night, for the ground is wet. (过去的猜测)

昨晚一定下雨了，因为地面上是湿的。

二、have to / have got to 的用法

1)must表示一种主观的需要，而have to 表示一种客观的需要，意思是“不得不”。 如：

I have to attend an important meeting this afternoon.

今天下午我不得不参加一个重要的会议。

Mother is out, so I have to look after the shop.

妈妈不在家，因此我不得不照看商店。

2)have to 的否定形式是don’t have to, 相当于needn’t。如：

They don’t have to buy a computer at present.

他们目前没有必要买电脑。

3)have to 与have got to 常可以互换。

三、巩固练习：

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1. Mike, you ______ play with fire. You______ burn yourself.

A. won’t; can’t B. mustn’t; may

C. don’t have to; must D. have got to; shouldn’t

2. You ______ see the doctor, Joe. You don’t look very well.

A. must B. shall

C. may D. can

3. ―Must I clean the win

高中too和to句式用法详解 篇3

2、在被动语态中，只有be allowed to do sth的句式结构,而没有sb be allowed doing sth。

即：

1)allow sb to do sth,allow后有人(宾语)时,用不定式,意思是允许某人做某事,如The teacher allowed us to discuss in class yesterday.

2)allow doing sth,allow后没有人(宾语)时,用动词ing形式,意思是允许做某事,如The teacher allowed discussing in class yesterday.没说允许谁做,所以用动词ing形式.

3)一般不用allow to do sth这种形式。

allow to do/doing的用法

allow 后接动词作宾语时，习惯上要用动名词，不用不定式。

allow doing sth 允许做某事 (doing sth 为宾语)。

allow 后接动词作宾语时，虽然不接不定式，但可接不定式的复合结构。

allow sb to do sth 允许某人做某事 (sb 为宾语，to do sth 为宾补)。

以上结构若用被动式，则为：

高中too和to句式用法详解 篇4

1) 当表示否定或基本否定的词或词组位于句首作状语时用倒装。

这类词或词组常用的有：never, nowhere, seldom, rarely, little, hardly, scarcely, barely, not until, not only, by no means, in no time, under no circumstances, under no condition, in no way, in no case, at no time, on no account等。

Never have I heard it before.

Nowhere can I find my lost watch.

Under no circumstance should a student cheat in the exam.

Not only was Churchill a statesman, but also a poet.

Note: 当 “no sooner … than”和“hardly/scarcely … when/before”位于句首时用倒装。

该结构表示“一…就…”，在时态上主句一般用过去完成时，when或than引导的从句用一般过去时。

Hardly/Scarcely had I got home when/before the bell rang.

No sooner had the performance begun than the lights went out.

2) 当here, there, then, thus, only, hence, little等副词位于句首，句中主、谓用倒装。

Here is the book for you.

There goes the bell.

Then came the order to take off.

Thus arose the division between the developed and developing countries.

3) 当 “so/such … that”结构中的so或such 位于句首时用倒装。

So cold was it at night that I could hardly fall asleep.

Such was the force of explosion that all the windows were broken.

4) 分句以so, neither, nor, no more等副词位于句首，表明前面句子中所说明的情况也使用于后面的句子时用倒装。

Copper is a good conductor. So are many other metals.

He didn’t see the film last night, neither did she.

2. 强调句型

这里讲的强调句主要是以it为引导词的分裂句。

其构成形式为：It is (was) +被强调部分+ that(who, which) + 句子的其他部分。被强调的部分通常为主语、宾语和状语。

It is only when one is ill that one realizes the value of health.

It is what you will do that is essential.

Note:

在被强调部分的后面，一般用that引出句子的其他部分。

但是如果强调的部分是表示人的名词，那么也可用who;如果是指物的名词也可用which。

It was Jane that/who lent me the money.

It was this novel that/which they talked about last night.

如果强调的是原因状语从句，只能用because引导，不能由since, as或why引导。

It was because(不用since或as) he had never had the opportunity that John hadn’t learned to drive.

有三类句子成分不可以进行强调，即表语、谓语动词和由though, although, whereas等引导的从句。

It is although he is young that he can speak four languages. (误)

Although he is young, he can speak four languages. (正)

It is whereas he prefers pop song that I like classical music. (误)

I like classical music whereas he prefers pop songs. (正)

3. 使役动词后的宾语补足语

使役动词除了要有宾语之外还要加上宾语补足语才能使句子的意义完整。

常用的使役动词有：have, want, make, get, leave, set, let等。可以担当使役动词宾语补足语的有名词，形容词，介词短语，动词不定式和分词等。

All work and no play makes Jack a dull boy.

A good night’s rest will set you right.

Note:

动词不定式可以担当使役动词的宾语补足语，但在make, let, have等使役动词后，动词不定式作宾语补足语时不用to。

He made her give up the opportunity.

What would you have me do?

Her pride would not let her do this.

分词也可以担当使役动词的宾语补足语。现在分词表示正在进行的主动意义，而过去分词表示已经完成的被动意义。

Her remark left me wondering what he was driving at.

The joke set them all laughing.

He managed to get the job done on time.