英語中的助動(dòng)詞用來構(gòu)成時(shí)態(tài)和語態(tài)。 助動(dòng)詞具有語法意義，但沒有詞匯意義，不可單獨(dú)作謂語。下面是小編給大家分享的學(xué)習(xí)內(nèi)容，大家可以作為參考。

英語助動(dòng)詞的用法口訣：

助動(dòng)詞，用法怪;只當(dāng)佐料不當(dāng)菜。

句型變換顯身手;常與時(shí)態(tài)談戀愛。

have完成be進(jìn)行;will將來三大塊。

加上各自過去式;總共構(gòu)成六時(shí)態(tài)。

否定疑問靠它們;用法如同be相待。

一般現(xiàn)在和過去;沒有助動(dòng)也無礙。

否定疑問照常變;過去did,do現(xiàn)在。

第三人單用does;遵守be法和情態(tài)。

助動(dòng)詞 do 在祈使句中的強(qiáng)調(diào)用法：

有時(shí)可在祈使句前加上助動(dòng)詞do (常重讀)，以表示說話人想特別強(qiáng)調(diào)他所說的話。這樣用的祈使句具有以下用法：

1. 表示強(qiáng)調(diào)的請(qǐng)求。如：

Do come with us. 請(qǐng)一定要和我們一起去。

Please! Do be quiet a moment! 求求你們! 安靜一會(huì)兒!

2. 表示委婉或客氣。如：

Do try this fish. 請(qǐng)嘗嘗這魚。

Do have another cup of coffee. 請(qǐng)?jiān)俸缺Х劝伞?/p>

3. 表示不耐煩。如：

Do stop talking! 別說啦!

4. 希望說服對(duì)方。如：

Do help me with this maths problem. 務(wù)請(qǐng)幫我解答這道數(shù)學(xué)題。

代替動(dòng)詞的do是助動(dòng)詞還是實(shí)義動(dòng)詞：

▲用來替代動(dòng)詞的do是助動(dòng)詞，也可以說用作“代動(dòng)詞”，用來表示剛提到的動(dòng)作，以避免重復(fù)。請(qǐng)看以下例句。

—Do you like Beijing? 你喜歡北京嗎?

—Yes, I do. 是的，喜歡。(do用作代動(dòng)詞，代替like Beijing)

I always eat peas with honey. My wife never does. 我總是就著蜂蜜吃豌豆。我的妻子從來不這樣吃。(does用作代動(dòng)詞，代替eat peas with honey)

▲但是要注意do so ,do it , do that這種結(jié)構(gòu)，do不是助動(dòng)詞，而是實(shí)義動(dòng)詞，而且是及物動(dòng)詞。例如:

She hoped that he would search the room carefully and he did so. 她希望他仔細(xì)地檢查房間，而他這樣做了。

At night, when you really wish to go to sleep, you rarely manage to do so. 夜里當(dāng)你正想入睡的時(shí)候，你卻很少能成眠。

I could run after a bus and catch it twenty years ago, but I can’t do that now.

Mr Brown goes to the hospital for treatment every week: in face, he has been doing it ever since I have known him.布朗先生每周去醫(yī)院治療：事實(shí)上，自從我認(rèn)識(shí)他依賴，他一直就是這樣。

do用作助動(dòng)詞的三種用法：

一、用于構(gòu)成疑問句、否定句或倒裝句

1. 構(gòu)成疑問句

Where do I pay? 我在哪兒付錢?

When do you start? 你何時(shí)動(dòng)身?

How did you do it? 你是怎么做的?

How do you feel today? 你今天感覺如何?

Why do you keep on smiling? 你怎么老是笑?

How does the story end up? 這故事結(jié)局如何?

How does she stay so young? 她怎么能永葆青春呢?

When did you realise that the money was missing? 你什么時(shí)候發(fā)覺錢丟了?

2. 構(gòu)成否定句

I don’t like football. 我不喜歡足球。

Please don’t annoy me. 請(qǐng)不要打攪我。

I didn’t arrive at the station early enough. 我到達(dá)車站不夠早。

I don’t care how expensive it is. 我不在乎這件東西有多貴。

I didn’t meet either Jane or her husband. 簡或是她的丈夫我都沒遇見。

He washed the car. He didn’t polish it. 他沖洗了汽車。他沒有擦拭它。

3. 構(gòu)成倒裝句

Never did he speak about his own merits. 他從不講自己的功績。

Very rarely did she receive letters from her brother. 她很少收到她兄弟的信。

Hardly had he arrived when she started complaining. 他一到家，她就抱怨起來。

Never did he think the book would be finished so soon. 他可沒想到這本書會(huì)這么快看完。

Seldom has a devoted teacher been so splendidly rewarded. 一位忠誠的教師很少受到如此豐厚的報(bào)答。

二、加在動(dòng)詞前，表示強(qiáng)調(diào)

She does like dogs. 她真的喜歡狗。

Do have another cup of coffee. 請(qǐng)?jiān)俸缺Х劝伞?/p>

Do be careful with that vase! 務(wù)必小心那個(gè)花瓶!

I do hope you’ll get better soon. 我真希望你早日康復(fù)。

He did come but soon went back. 他是來了，但很快就回去了。

三、用來表示剛提到的動(dòng)作，以避免重復(fù)

“She likes cakes.” “She really does.”“她喜歡吃蛋糕。”“她的確喜歡。”

Watch that man—I want to know everything he does. 盯住那個(gè)人——我要了解他的一切活動(dòng)。

I always eat peas with honey. My wife never does. 我總是就著蜂蜜吃豌豆。我的妻子從來不這樣吃。

She paid them a generous wage for the little they did. 她為他們的那么一點(diǎn)工作付了很高的工資。

Some parents did it only once a week, some said they never did. 一些父母每周僅做一次，一些父母則說他們從來不做。

以上就是小編給大家分享的英語助動(dòng)詞知識(shí)，希望可以給大家學(xué)習(xí)帶來幫助。