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八年级动词不定式的知识点

2017-08-12 投稿作者:红尘路上 点击:26

篇一:八年级动词不定式的知识点

作为初中三年中承上启下的一年,对学生和家长来说都至关重要。为帮助初二的同学们能够更好地掌握相关知识,特别整理《大全:动词不定式用法详解》,希望对大家有所帮助。

尽管动词不定式用法灵活多样;尽管有些动词或短语后面既可以接to do 又可以接 doing ,但只要我们用心观察,发现还是可以找到规律的。与其说是动词不定式,到还不如说是动词“定式”。因为我们可以大体上把它分为三类形式,即: do / to do / doing

动词不定式没有人称和数的变化,在句中不能独立作谓语,是非谓语形式的一种。但动词不定式具有名词、形容词和副词特征,在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外,动词不定式具有动词特点,可以有自己的宾语和状语,组成动词不定式短语。动词不定式的肯定形式是 to+do;其否定形式是 not to+do。

下面以动词不定式在句中的作用来予以详细说明,希望同学们从中找到规律,下次FOX嘉洲来和你一起讨论并解决问题。

1.作主语

可以直接作主语。如:

To see is to believe.

但在英语中,常用it作形式主语,真正的主语即动词不定式放在后面。如:

It s wrong to play tricks on other people.

It s our duty to keep our environment clean and tidy.

点击规律:动词不定式在句中作主语时,常放在It is +adj.(形容词)+to do sth.或 It is +n.(名词)+to do sth.句型中,it仅作形式主语。

2.作宾语

a.want,decide ,agree等动词后面跟并且只能跟不定式。如:

We agreed to start early.

She wants to be a doctor.

b.love,like ,begin,start,hate ,prefer等词后面可以接不定式。

点击规律:上述动词后面除接不定式外,还可以接动名词,意思无很大区别。

提示板:like doing指经常性动作,而like to do指一次性的动作。如:

I like swimming,but I don t like to swim now.我喜欢游泳,但我现在不想游。

c.stop,forget,remember,go on ,try等词或短语后面可以接不定式。

点击规律:上述动词后面接不定式和接动名词意思大不相同。

提示板:

1)stop to do sth.:停止一件事,去做另一件事。

stop doing sth.:停止正在做的事。

例句:When the teacher came in,the students stopped talking;when he came out,the students stopped to talk.

当老师走进来时,学生们停止说话;当老师走出去时,学生们又开始说话。

2)思考:forget,remember,go on,try等词或短语后面接不定式和动名词用法有何区别?

d.在find/feel+it+adj.+to do sth.句型中,it是形式宾语,真正的宾语是后面的动词不定式。如:

The man downstairs found it difficult to get to sleep.

I feel it easy to recite the text.

点击规律:某些动词或短语后面既可以接动词不定式作宾语,又可接动名词作宾语,二者用法上的区别可以通过造句子加以区分,如上面stop例句。

3.作宾语补足语

a.tell,ask,want,order,teach,invite,warn,wish,help,get等词后面常接不定式作宾补。如:

I tell him not to go there by bus .

Edison s mother taught him to read and write.

b.let,make,have,see,hear,feel,watch, notice后面接不带to的不定式作宾补。如:

The boss makes them work 16 hours a day.

I heard her sing in the next room.

提示板:若变成被动语态,在上述结构中,不定式符号to要加上。如:

They are made to work 16 hours a day by the boss.

She was heard to sing in the next room.

4.作定语:放在被修饰的名词、代词后面

例句:I have a lot of work to do.

The doctor said he could do nothing to help the boy.

点击规律:动词不定式若在句中作定语,常放在被修饰的名词、代词之后。

提示板:如果动词不定式和前面所修饰的词构成动宾关系,若动词是不及物动词,切记不要忘掉介词。如:

I have a small bedroom to live in.

Have you got some pens to write with?

5.表语:放在连系动词be后面

例句:His wish is to become a scientist.

The first important thing is to save the soldiers lives.

当务之急是抢救战士们的生命。

点击规律:动词不定式在句中作表语时,通常对连系动词前面的名词进行诠释说明。

6.作状语

a.目的状语:放在go,come,use,live,in order等词后面。如:

I come to see you.

He runs fast in order to get there in time.

b.原因状语:放在sorry,glad,surprised, disappointed,excited等词后面。如:

I am glad to see you here.

I am sorry to trouble you.

c.作结果状语。如:

Some of the apples are hard to reach.

The room is large enough to hold 1000 people.

7.与what,who,whose,when,where, how等疑问词连用,作宾语、宾语补足语、主语等。如:

I don t know what to do next.(宾语)

He taught us how to use the computer.(宾语补足语)

It s still a question how to get there.(主语)

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篇二:八年级动词不定式的知识点

【精品学习网-英语知识点】初二英语动词知识点:英语动词不定式的形式知识点 "初二英语动词知识点:英语动词不定式的形式知识点"一文由精品学习网初中频道编辑整理,更多精选内容请关注本频道栏目!初二英语动词知识点:英语动词不定式的形式知识点

1.作主语。

如:

To learn English is very important.

(本文来自:Www.bdfqY.cOm 千 叶帆文 摘:八年级动词不定式的知识点)

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)

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