您的位置:百味书屋 > 范文大全 > 经典范文 > practise,的用法详解 正文

practise,的用法详解

2016-10-21 00:08:40 来源网站:百味书屋

篇一:it的用法归纳

? Never be afraid of grammar

? Collect some examples;

? Watch them very carefully;

? Find out something in common;

? Try to use the rules ---- practise.

it用法完全归纳

一、it 作人称代词的用法

1. 指事物

作为人称代词,it 可以除人以外的一切事物或动物。如: I dropped my watch and it broke. 我把手表掉在地上摔坏了。 It’s hard work, but I enjoy it. 工作很辛苦,可是我乐意干。 “Where is the dog?” “It’s in the bedroom. ” “狗在哪?”“在卧室里”。

2. 指人

it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如:

Is it a boy or a girl? 是男孩还是女孩?

There is a knock on the door. It must be the postman. 有人在敲门,一定是邮递员。

【说明】在答语中,常用来指本人,如说 It’s me。

3. 代替某些代词

代词 it 还可用于代替指示代词this, that 以及复合不定代词 something, anything, nothing等。如:

“What’s this?” “It’s a new machine. ” “这是什么?”“是一种新机器”。

Nothing is wrong, is it? 没出什么问题,是吗?

二、it 作非人称代词的用法

1. 基本用法

it 作非人称代词的用法,主要用于指时间、距离、价值、天气、气候及温度等自然现象。如:

It’s too late to go there now. 现在去那儿已经太迟了。

It rained all day yesterday. 昨天下了一天的雨。

It can get very hot here. 这里有时会很热。

2. 用于某些句型

It’s time for sth. 该做某事了。

It’s time to do sth. 该做某事的时候了。

It’s time for sb to do sth. 某人该干某事了。

It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式,有时也用“should+动词原形”)

It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)

It’s + 时间段 + since-从句. 自从……有一段时间了。

It’s + 时间段 + before-从句. 过多长的时间才……

三、it用作形式主语

1. 基本用法

当不定式、动名词、从句等复杂成分用作句子主语时,为保持句子平衡,通常把真正的主语放在句末,而在句首使用形式主语it。如:

It’s very important to remember this. 记住这一点很重要。

It’s hard work climbing mountains. 爬山是费劲的事。

It’s unknown when he will come. 他什么时候来还不知道。

2. 用作形式主语的的重要句型

(1) It + be + adj. for (of) sb to do sth 某人做某事……

It is hard for him to make up his mind. 他很难下定决心。

It was foolish of her to say such a thing. 她说那样的话,真是太蠢了。

【说明】介词 of 与 for 的区别是:of 用于指某人的性格、属性、特征等,介词for表示对象,意为“对……来说” (from )。

(2) It takes sb + 时间段 + to do sth. 某人做某事花了……时间

It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。

【说明】此句型可以有以下多变种变体:It took me an hour to write the letter. =The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时。

(3) It is up to sb to do sth. 该由某人做某事

It’s up to you to to make the choice. 得由你来作选择。

(4) it look (seem, appear, happen, occur) that [as if]? 似

乎……

It seemed as though he didn’t recognize me. 他似乎没认出我来。

It happened that I was out when he called. 他打电话时我碰巧不在家。

(5) If it were not for? / If it hadn’t been for? 若不是因

为……

If it were not for their help, we couldn’t have got over the

difficulties. 要不是他们帮助,这些困难我们不克服不了的。

四、it用作形式宾语

1. 基本用法

当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时,通常会在宾语补足语前使用形式宾语,而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如:

I find it difficult to do the job well. 我发现做好这件事不容

易。

I think it best that you should stay here. 我认为你最好住这

儿。

We think it no use complaining. 我们认为抱怨是没有用的。

2. 用作形式宾语的几个特殊结构

(1) 动词+ it + that-从句。如:

I like it that you came. 你来了,我很高兴。

I take it (that) he will come on time. 我认为他会准时来的。 You can put it that it was arranged before. 你可以说这是以前安排的。

Rumor has it that the defence minister will soon resign. 据传

闻,国防部长不久就要辞职。

【说明】能用于此结构的动词不多,常见的有 have, take, put, like 等。

(2) 动词 + it + when (if)-从句。如:

I dislike it when you whistle. 我不爱听你吹口哨。(from

)

篇二:动词用法详解

——动词

(一)动词的种类

动词是表示动作或状态的词,按其词义和在句子中的作用可分为行为动词,连系动词,助动词和情态动词。

1.行为动词

行为动词可分为及物动词 (vt)和不及物动词(vi),及物动词表示动作或状态,有完整的词义,能单独作谓语,后跟宾语;不及物动词表示动作或状态,有完整的词义,能单独作谓语,但后面不能直接跟宾语,如要带宾语则与介词或副词构成短语。

如:

More and more people study English.(vt)

The students are listening to the teacher carefully.(vi)

2.连系动词

连系动词本身有一定的词义,但不能独立作谓语,必须与表语一起构成谓语。常用的连系动词有 be, get, turn, become, look, feel, grow, seem, sound, taste, smell等。

如:

Our country is becoming stronger and stronger.

It feels damp. 

3.助动词

助动词本身无词义,不能单独作谓语,只能和主要动词一起构成谓语动词,表示否定,疑问及动词的时态、语态、人称和数等语法特征,助动词有 be,do,have,shall,will等。

如:

How do you usually come to school?

The children are playing yo-yo now. 

4.情态动词

情态动词本身有一定的意义,但不能独立作谓语,只能和主要动词原形一起构成谓语,表示说话人的语气和情态。情态动词没有人称和数的变化。情态动词有 can (could),may(might),must, need, ought to, dare等。 如:

Can I help you?

- Must we go now? –No, you needn't .

a. can与be able to的用法有所区别。can只用于一般现在时和过去时,指本身有能力的“能”;be able to用于各种时态均可,指须经过努力而“能”。

b. must与have/has to的用法。must表示说话人主观认为“必须”,只用于一般现在时和一般将来时;have/has to表示客观需要,意为“不得不”,它可用于各种时态。

c.need和dare既可作情态动词也可作行为动词。

(二)动词不定式

动词不定式 to do没有人称和数的变化,在句中不能独立作谓语,但可以和助动词或情态动词构成谓语,又可以在句子中作宾语、宾语补足语、状语、定语、主语、表语等。但它毕竟是动词,因此,具有动词的许多特点,如它可以有自己的宾语或状语构成不定式短语。 1.作主语。 如:

To learn English is very important.

但实际上不定式作主语常用 it来作形式主语,而将不定式移至谓语动词后作真正的主语。

如上句可表达为:

It's very important to learn English. 

2.作表语。 如:

My idea is to ring him up at once. 

3.作宾语。 如:

I have decided to go to Binjiang Primary School. 

4.作宾语补足语。

a. ask, want, teach, tell, know, would like, allow等动词后面接动词不定式作宾语补足语。

如: The policemen asked him to get off the bus.

b. hear, see, look at, feel, watch, notice, listen to等动词后接不带to的动词不定式作宾语补足语。 如: We often see Miss Li clean the classroom.

c. let, make, have这些使役动词后接不带to的动词不定式作宾语补足语。但在被动语态中这些不带to的都须带上to。

如: In those days the bosses often made the workers work day and night.

d.动词help接动词不定式作宾语补足语,可带to也可不带to。

如: Can you help me (to) carry the heavy bag? 

5.作定语。

a.与被修饰词有动宾关系。如:I have something important to tell you.但如果不定式动词为不及物动词,后面的介词千万不要省略。

如: Maybe they have three rooms to live in.

b.与被修饰词有主谓关系。

如: Mr Liang is always the first to come and the last to leave.

c.与被修饰之间只有修饰关系。

如: I have no time to play cards. 

6.作状语,表示目的、原因、方法、方向、结果等。

如: I'll go to meet my friend at the railway station. 

7.不定式复合结构“for sb. to do sth” 作主语时,常用“It is +adj+ for

of sb. to do sth”的句式。形容词good, bad, polite, unkind, kind, ice, clever,

right, wrong, careful等用“It is +adj +of sb. to do sth.”

其他形容词用 for。

如:

It's dangerous for you to ride so fast.

It's very kind of you to help me. 

8.动词不定式与疑问句who, what, which, when, how, where, whether等连用。

如: I don't know when to start.

He didn't tell me where to go.

但上面结构相当于一个从句,故上述句子也可表达为:

I don't know when we'll start.

He didn't tell me where he would go. 

注意:

a.有些动词或动词短语不能带不定式,只能接动词的-ing形式。

如: enjoy, finish, keep, mind, miss(错过),be busy, go on, keep on, be worth, practise等。 如: The peasants are busy picking apples.

Would you mind my opening the door?

b.有些动词后可接不定式,也可接动词的-ing形式,但意思不同。

如: Lu Jian forgot to post the letter.(该寄但还没做)

Lu Jian forgot posting the letter.(已经寄过信了)

They stopped to sing a song.(停止在做的工作而去做另一件工作)

They stopped singing.(停止正在做的工作)

篇三:英语中名词的用法

一、英语中各种词性的用法及解释

1.名词

名词可以分为专有名词(Proper Nouns)和普通名词 (Common Nouns)。

专有名词是某个(些)人,地方,机构等专有的名称,如Beijing,China等。 (不是专有名词就是普通名词)

(1) 名词变复数的方法

1)规则的变复数的方法

2)不规则变化情况

① 以o 结尾的名词,变复数时:

a. 加s,如: photo---photos piano---pianos

radio---radios

zoo---zoos;

b. 加es,如:potato—potatoes tomato—tomatoes

(基本规律:有生命性质的词在后面加es,否则加s)

② 以f或fe 结尾的名词变复数时:

a. 加s, 如: belief---beliefs roof---roofs safe---safes

gulf---gulfs;

b. 去f, fe 加-ves,如:half---halves knife---knivesleaf---leaves

wolf---wolves wife---wiveslife---lives thief---thieves;③ 名词复数的不规则变化

child---childrenfoot---feet tooth---teeth mouse---mice man---men

woman---women

④ 单复同形如:deer,sheep,fish,Chinese,Japanese

集体名词,以单数形式出现,但实为复数。

如: people police cattle 等本身就是复数,不能说 a people,a police,a

cattle,但可以说a person,a policeman,a head of cattle, the English,the

British,the French,the Chinese,the Japanese,the Swiss 等名词,表

示国民总称时,作复数用。

⑤ 以s结尾,仍为单数的名词,如:

⑥ maths,politics,physics等学科名词,为不可数名词,是单数。news 是

不可数名词。

(2)名词的格

1)在英语中有些名词可以加"'s"来表示所有关系,带这种词尾的名词形式称为

该名词的所有格,如:a teacher's book。名词所有格的规则如下:

2) 单数名词词尾加"'s",复数名词词尾没有s,也要加"'s",如the boy's bag 男

孩的书包,men's room 男厕所。

3) 若名词已有复数词尾-s ,只加"'",如:the workers' struggle工人的斗争。

4) 凡不能加"'s"的名词,都可以用"名词+of +名词"的结构来表示所有关系,

如:the title of the song 歌的名字。

5) 在表示店铺或教堂的名字或某人的家时,名词所有格的后面常常不出现

它所修饰的名词,如:the barber's 理发店。

6) 如果两个名词并列,并且分别有's,则表示"分别有";只有一个's,则表

示'共有'。

如:John's and Mary's room(两间)John and Mary's room(一间)

例题解析

1. They got much _____ from those new books.

A. ideasB. photosC. newsD. stories

2. I have two _______ and three bottles of _________ here.

A. orange, orange B. oranges, oranges

C. oranges, orangeD. orange, oranges

3. Every evening M r. King takes a _________ to his home .

A. 25 minutes’ walkB. 25 minute’s walk

C. 25 minute walk D. 25 minutes walk

解析: 句中的 minute应该用其复数的所有格形式,只+’,而不能+s,因此选A。

4. An old _______ wants to see you.

A. peopleB. person C. the people D. the person

解析: person 与people 都有”人” 的意思, 但用法不同. “一个人”用 “a person”, “两个人” 用 “two persons”; people 泛指 “人们”是集合名词,表示复数, the people 指 “人民”, a people 指 “一个民族”. 应选B。

5. Help yourself to __________.

A. chickens and apples B. chickens and apple

C. chicken and apple D. chicken and apples

解析: chicken 可用作可数名词指小鸡,用作不可数名词指鸡肉,根据词题意应理解为鸡肉;apple为可数名词, 故应+s, 因此选D。

6. Oh, dear. I forgot the two _________.

A. room’s numberB. rooms’ number C. room numbersD. rooms’ numbers

解析: room number 房间号码. room可直接用作定语修饰后面的名词 . 类似的还有my phsics teacher,

two bus drivers 等. 应选C。

7. She has been in Tianjin for ten years. Tianjin has become her second _________.

A. family B. houseC. home D. room

解析: family指的是家庭或是家庭成员; house指的是房子(住所); room 指的是房间;而home 指的是家, 因此选C.

8. ________ mothers couldn’t go to the meeting, because they have gone to Shanghai .

A. Mary and Peter’s B. Mary and Peter

C. Mary’s and Peter D. Mary’s and Peter’s

解析: 此句中 “mothers”是复数,表示两个人各自的母亲,因此应选D。

9. Li Lei has been to __________ many times this month.

A. her uncle B. her uncle’s C. her uncles D. aunt’s

解析: 此句意为 “李雷这个去她舅舅家多次”. 表示具体场所时, 可省去所有格后面的名词.

因此选B。

10. He is a success as a leader but he hasn’t ________ in teaching.

A. many experiences B. much experience

C. an experience D. a lot experience

解析: experience 作 “经验” 讲时是不可数名词, 作 “经历”讲时是可数名词. 本句中应理解为 “经验”,因此是不可数名词,排除 A C. 又因 a lot of , lots of, plenty of 只用于肯定句, 不用于否定句, 因此选B。

11. A classmate of _________ was here ten minutes ago.

A. you B. yourC. your sisterD. your sister’s

解析: 此题考查名词的双重所有格.应选D。

12. A group of _________ are talking with two ___________.

A. Frenchmen, Germans B. Germans ,Frenchmans

C. Frenchmans , Germen D. Germen , Frenchmen

解析: Frenchman 是复合词,其复数形式为 Frenchmen; German 的复数为直接在单词末尾+S, 应选A.

13.The team ________ having a meeting .

A. is B. areC. am D. be

解析: team 是一个集合名词,即可表示复数意义(指整个小组) , 也可指小组中的成员(表示复数), 此题意为后者, 因此选B。

14. “Would you like _________?” “________, please.”


practise,的用法详解》出自:百味书屋
链接地址:http://www.850500.com/news/7507.html
转载请保留,谢谢!
查看更多相关内容>>practise,的用法详解
相关文章
  • practise,的用法详解

    it的用法归纳?Neverbeafraidofgrammar?Collectsomeexamples;?Watchthemverycarefully;?Findoutsomethingincommon;?Trytousetherules----practise it用法完全归纳一、it作人称代词的用

推荐范文