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dozen的用法

281 2024-01-26 20:33 admin

一、dozen的用法

dozen和dozens的用法

dozen可用复数吗?dozen后要接of吗?你知道dozen的用法吗?请先看下面一道试题:

We already have _________ pencils,but we need two _________ pens.

A.dozen of,dozen B.dozens of,dozens C.dozens of,dozen D.dozens of,dozen of

关于dozen的复数是否加词尾-s的问题比较复杂,大致原则是:

1.当它与具体数字连用时,既不加复数词尾-s,也不后接介词of.尽管有的词书也有 two dozen of 这样的用例,但这已属过时用法,在考试中应避免,如1992年全国高考有一道单项选择题就认为two dozen of为错误选项:

Shortly after the accident,_________ police were sent to the spot to keep order.

A.dozens of B.dozens C.dozen of D.dozen [D]

2.当它不与具体数字连用,而是表示不确定的泛指数时,则不仅要加复数词尾-s,而且要后接介词 of,此时可将dozens of(许多,几十)视为习语.如:

I’ve been there dozens of times.我去过那儿几十次.

She’s got dozens of boy-friends.她的男朋友很多.

下面一例中的dozens加了复数词尾-s也属为似情况:

Pack them in dozens.按打装袋吧.

3.当与 a few,several 等数目不很具体的词连用时,加不加复数词尾-s均可,但需注意:不加复数词尾-s时,其后的介词of可以省略;加词尾-s时,其后介词 of不能省略.如:

several dozen (of) pencils=several dozens of pencils几打铅笔

注:英语较少使用many dozen的说法,要表示类似意思可用dozens of.

4.当它后面的名词受 the,these,those 等特指限定词修饰时,或其后的接的是us,them这样的人称代词时,则此时必须用介词 of.如:

two dozen of these eggs 两打这种鸡蛋

three dozen of them 它们中的3打

注:score,hundred,thousand,million等也具有以上类似用法.

你看下,明白没?没得话,

这里说实在的最主要的还是方法,方法掌握了,类似的问题都能解决了!

像这样的问题自己多尝试下,下次才会的!

二、plenty的用法

plenty

[5plenti]

n.

丰富, 充分, 大量

years of peace and plenty

太平丰收年

There is plenty of room in my bag.

我包里还很空。

There are plenty of men out of work.

有很多人失业。

We have plenty of time to finish the job.

我们有充裕的时间完成这项工作。

plenty

[5plenti]

adj.

[常用作表语]很多的, 足够的

This is plenty.

这就足够了。

plenty

[5plenti]

adv.

(=quite) 完全, 十分

plenty good enough

足够好的了

【说明】plenty只用于陈述句, 在疑问句或在否定句中一般用 enough 如: We have plenty of food for the holiday. Have you enough food for the holiday? We have not enough food for holiday.

in plenty

很多

处于优裕环境之中, (过)优裕的生活

P-is no plague.

[谚]多多益善。

plenty more

还有很多, 大量的

三、suppose的用法

suppose如何用

suppose的基本意思是“猜想;以为;假定”,但在具体的语言环境中意义不止于此,其用法如下:

1. suppose + that 从句,表示“猜测;假定”。如:

I suppose that you are right. 我想你是对的。

You can suppose that A equals B. 你可以假定A等于B。

2. suppose +名词 / 代词 + to be...,表示“认为……是……”。如:

Many people suppose him to be over 50. 许多人认为他已经50多岁了。

3. suppose用于祈使句中,表示“让……”。如:

Suppose we go for a swim. (= Let's go for a swim.) 让我们去游泳吧。

be supposed to 的用法

用法一: be supposed to... 其中to是动词不定式符号,不是介词,其后要跟动词原形。当be supposed

to... 的主语是“人” 时,意为“应该……

”;“被期望……”,它可以用来表示劝告、建议、义务、责任等,相当于情态动词should。如:

Everyone is supposed to wear a seat-belt in the car.

每个人在汽车里都应该系安全带。

Teachers are supposed to treat all the students alike.

老师应该对所有的学生一视同仁。

用法:当be supposed to... 的主语是“物”时,它表示“本应;本该”,用于表示“某事本应该发生而没有发生”。如:

The new laws are supposed to prevent crime. 这些新法令本应该起到防止犯罪的作用。

The train was supposed to arrive half an hour ago. 火车本应在半小时之前到达。

用法三: be supposed to后面接“have + 过去分词”时,表示“本应该做某事而没做”。如:

You are supposed to have handed in your homework by now.

现在你应该已经把作业交上来了。

He is supposed to have arrived an hour ago. 他应该一小时前就到了。

用法四: be supposed to... 的否定结构为be not supposed

to...,它常用于口语中,意为“不被许可;不应当”。如:

She was not supposed to be angry about that. 她本不该为那件事而生气的。

You are not supposed to smoke on the bus. 你不应该在公共汽车上吸烟。

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