英语中情态动词表推测的用法

英语单词是英语学习的基础,许多学生在记单词时经常会出现各种问题,比如记住了英文却不知道中文意思等等,下面小编给大家分享英语中情态动词表推测的用法，希望能够帮助大家!

英语中情态动词表推测的用法篇1

Nowadays, with the rapid development of information technology, internet and electronic commerce have been very popular in our daily lives. For example, it is fashionable for youngsters to purchase daily essentials, such as books, clothes, electrical equipment, on some famous website, like Taobao, EBay and Alibaba, through many courier companies. As we all known, online shopping has many advantages. Firstly, online shopping is more convenient than traditional means. We can find a shop with so many goods that we may favor, while all these just need clicking our mouse and typing-in the key word of what we want to find. And it also saves our a great some of time. Secondly, more choices than real store are another attraction to customers. Online shopping can provide mass information about products which can be suit for customer's needs, tastes, and preferences. Thirdly, as without traditional warehouses and retail shops, online shopping has can make us gain lower costs and prices. However, in spite of its advantages, we can't turn a blind eye to its disadvantages. Obviously, quality problem is its first disadvantage.

Customers always buy fake commodities which are not described as online shops. In addition, it's troublesome and annoying for us to make a change when they are not satisfied with what we bought online. The second disadvantage is security issues. When we shop online, we need pay for the commodities by electronic payments, but hackers can invade our computers and steal our information, this is not safe for online shopping.

英语中情态动词表推测的用法篇2

一、确定被猜测时间，正确判断动词时态形式。

1.对现在或将来的情况进行猜测，用“情态动词+do”的形式;对现在或将来正在进行的情况进行猜测，用“情态动词+be doing”的形式。如：

①He may/ might come tomorrow.明天他可能会来。(将来)

②He may/ might know it.他可能知道这事。(现在)

③He may/ might be waiting for you now.他可能正在等你。(现在进行)

④He may/ might be waiting for you when you get there tomorrow.明天你到那里时，他可能会在等着你。(将来进行)

2. 对过去或已发生的情况进行猜测，用“情态动词+have done”的形式;对过去进行或现在完成进行的情况进行猜测用“情态动词+have been doing”的形式。如：

①He might have seen the film yesterday.昨天他可能已看了那部影片了。(过去)

②He may/ might have arrived in Beijing by now.现在他可能已到达北京了。(现在完成)

③He might have been waiting for you when you phoned him.你给他打电话时，他可能已在等你了。(过去完成进行)

二、把握猜测语气特点，选择恰当情态动词。

1. 熟记情态动词的语气特点和用法限制。

1)表示肯定的猜测时，各情态动词语气强弱如下：

最强——must(一定)

will (很有可能)

would(很有可能)

ought to(应该，很有可能)

should(应该，很有可能)

can(可能)

could(可能)

may(可能)

最弱——might(可能)

2)表示否定的猜测时can't / couldn't语气最强，指“不可能”;may / might not语气最弱，意思是“可能不”。

3)一些情态动词表猜测时的用法限制。

must只用于肯定句;

may/ might一般不用于疑问句;

could可用于各种句式;而can多用于否定句、疑问句，用于肯定句时，多指“客观可能性”。如：

Lightning can be very dangerous.闪电可能会非常危险。

2. 把握题干猜测语气的强弱。

题干中如果有客观依据，应该选择猜测语气最强的情态动词;如果没有客观依据，则应选择猜测语气最弱的情态动词。如：

—Are you coming to Jeff's party?

—I'm not sure. I ________go to the concert instead.

A. must B. would C. should D.might

本题中的猜测没有客观依据。说话人对是否会去参加聚会还没拿定主意，去听音乐会也仅仅是有可能而已。因此，应选语气最弱项，答案为D。

另外，在特定的语境中，一些“情态动词+have done”不再对一件事情是否发生进行猜测，而是对已发生的事表达自己的看法，有时具有一定的感情色彩。

①ought to/ should have done本该做(却未做);oughtn't to/ shouldn't have done本不该做(却做了)，含有“责备”之意。如：

You shouldn't have done that; I had warned you of that several times.我已多次警告你，你本不该那么做的。

②might have done本可以做(却没有)，有时表示很委婉的责备。如：

You might have phoned me, though you were busy then.你再忙也该给我打个电话。

③could have done本可能(却没有)如：

He could have caught the early bus, but he was delayed by helping a stranger.他本能够赶上早班车;他是因为帮一个陌生人而晚点的。

④would(not) have done本想做(却没做)/本不想做(却做了)。如：

I would have helped you, but I was too busy.我本想帮你，可我太忙了。

情态动词must用法归纳：

英语中情态动词表推测的用法篇3

■及物动词与不及物动词

根据后面是否带宾语，行为动词又可分为及物动词和不及物动词，及物动词(vt. ) 后面要跟宾语，不及物动词(vi. ) 不跟宾语。如：

They study hard. 他们勤奋学习。(study后没有宾语，是不及物动词)

I know them well. 我很了解他们。(know后有宾语them，是及物动词)

注：有的动词既可作及物动词，也可用作不及物动词。如：

She sings very well. 她唱得很好。(sing是不及物动词)

She sang an English song just now. 她刚才唱了一首英文歌。(sing是及物动词)

■动态动词和静态动词

根据词义特点，行为动词可分为动态动词和静态动词。动态动词表示动作，如give, take, work, run等;静态动词表示感觉、情感、内心世界、相互关系等，如know, live, lie, exist, be, have, mean, seem, appear, sound, prove, concerns, hate, dislike, like, love, prefer, surprise, astonish, satisfy, contain, include, matter depend on, belong to, guess, suppose，imagine, believe, doubt, admire, envy等。

■延续性动词和非延续性动词

根据动作是否延续，行为动词又分为延续性动词和非延续性动词。如rain, live, work, learn等是延续性动词，go, come, leave, start, arrive, join, finish, end等是非延续性动词。

注：非延续性动词在肯定句中通常不与表示时间段连用的for短语连用。如：

[译]他离开这里三天了。

[误]He has left here for three days.

[正]He has been away from here for three days.

[正]He left here three days ago.

[正]It’s three days since he left.

■限定动词与非限定动词

限定动词在句中作谓语，有人称和数的变化。非限定动词有动词不定式、动名词和分词三种，在句中不能单独作谓语，没有人称和数的变化(详见非谓语动词一章) 。如：

The room needs cleaning. 这房间需要清洁了。(needs在句中用谓语，是限定动词;cleaning是动名词作needs的宾语，属非限定动词)