6. should
1）表義務(wù)。意為“應(yīng)該”（某件事宜于做），用于各種人稱。
You should be polite to your teachers. 你對(duì)老師應(yīng)該有禮貌。
You shouldn't waste any time. 你不應(yīng)該浪費(fèi)時(shí)間。
2）表推測，意為“想必一定、照說應(yīng)該、估計(jì)”等。
The film should be very good as it is starring first—class actors.
這部新電影是一流演員主演的，估計(jì)拍得很好。
They should be home by now. 照說他們現(xiàn)在應(yīng)當(dāng)已經(jīng)到家了。
7.would
1）表意愿。
They would not let him in because he was poorly dressed. 他們不讓他進(jìn)去因?yàn)樗轮婆f。
I said I would do anything for you. 我說過我愿意為你做任何事。
2）表委婉地提出請(qǐng)求、建議或看法。
Would you like another glass of beer？ 再來杯啤酒好嗎？
Would you mind cleaning the window？ 請(qǐng)把窗戶擦一下好嗎？
They wouldn't have anything against it. 他們不會(huì)有什么反對(duì)意見。
3）表過去反復(fù)發(fā)生的動(dòng)作或過去的一種傾向。
Every time she was in trouble，she would go to him for help.
她每遇到麻煩都會(huì)向她求助。他告訴我盒子打不開了。
8. ought to
1）表義務(wù)，意為“應(yīng)該”（因責(zé)任、義務(wù)等該做），口氣比should稍重。
You are his father. You ought to take care of him. 你是他父親，應(yīng)當(dāng)管他。
You oughtn't to smoke so much. 你不應(yīng)該抽這么多煙。
2）表推測，暗含很大的可能，語氣較弱。
Han Mei ought to know his telephone number. 韓梅該知道他的電話號(hào)碼。
There's a fine sunset； it ought to be a fine day tomorrow. 今天有晚霞，明天應(yīng)該是個(gè)好天。
9. used to
表示過去的習(xí)慣動(dòng)作或狀態(tài)，現(xiàn)在不復(fù)發(fā)生或存在。疑問式和否定式有兩種。
He used to live in the countryside，but now he lives in the city.他過去住在鄉(xiāng)下，現(xiàn)在住在城里。
There used to be a building at the street corner，but it has been pulled down.
街道拐角處過去有座樓房，現(xiàn)在拆了。
I usedn't （didn't use） to smoke. 我過去不抽煙。
Used you （Did you use） to go to school on foot？ 你過去常步行去學(xué)校嗎？
（一）need和dare的用法
need和dare既可用作情態(tài)動(dòng)詞，也可用作實(shí)義動(dòng)詞。用作情態(tài)動(dòng)詞時(shí)，主要用于否定句和疑問句。用作實(shí)義動(dòng)詞時(shí)，可用于各種句式。
1.用作情態(tài)動(dòng)詞
——Need I come？ ——Yes，you must. ——我需要來嗎？ ——需要。
You needn't telephone him now. 你現(xiàn)在不必打電話給他。
I don't think you need worry. 我想你不必發(fā)愁。
She dare not go out alone at night. 她晚上不敢一個(gè)人出去。
How dare you say I'm unfair？ 你竟敢說我不公平？
Not one of them dared mention this. 他們誰也不敢提這件事。
2.用作實(shí)義動(dòng)詞
You don't need to do it yourself. 你不必親自做這件事。
We need to tell them the news. 我們需要把這消息告訴他們。
The table needs painting （to be painted.）。 桌子需要油漆一下。
We should dare to give our own opinion. 我們要敢于提出自己的觀點(diǎn)。
He did not dare （to） look up. 他不敢抬頭看。
I dare day he'll come again. 我想他會(huì)再來的。
（I dare say…為固定習(xí)語）
（二）情態(tài)動(dòng)詞后跟完成式和進(jìn)行式的用法
1.情態(tài)動(dòng)詞后跟完成式，表“應(yīng)當(dāng)已經(jīng)……”，“想必已經(jīng)……”，“本來可以……”等意。
I should have finished the work earlier. 我應(yīng)當(dāng)早一點(diǎn)完成這項(xiàng)工作的。
He isn't here. He must have missed the train. 他還未到，一定是沒趕上火車。
Where can （could） he have gone？ 他能到那里去了呢？
You may （might） have read about it. 你可能在報(bào)上已經(jīng)讀到這件事了。
You could （might） have been more careful. 你本來可以更細(xì)心的。
He needn't have worried about it. 他本不必為此事?lián)摹?BR> There was a lot of fun at yesterday's party. You ought to have come，but why didn't you？
昨天的聚會(huì)非常有意思。你本應(yīng)該來，為何不來呢？
2. 情態(tài)動(dòng)詞后跟進(jìn)行式，表示“想必正在……”，“可能正在……”，“應(yīng)當(dāng)正在”等意。
It's twelve o'clock. They must be having lunch. 現(xiàn)在是十二點(diǎn)。他們一定正在吃飯。
They may be discussing this problem. 他們可能正在論討這個(gè)問題。
He can't be telling the truth. 他說的不可能是真話。
She shouldn't be working like that. She's still so weak. 她不應(yīng)當(dāng)那樣干，她身體仍那么虛。
1）表義務(wù)。意為“應(yīng)該”（某件事宜于做），用于各種人稱。
You should be polite to your teachers. 你對(duì)老師應(yīng)該有禮貌。
You shouldn't waste any time. 你不應(yīng)該浪費(fèi)時(shí)間。
2）表推測，意為“想必一定、照說應(yīng)該、估計(jì)”等。
The film should be very good as it is starring first—class actors.
這部新電影是一流演員主演的，估計(jì)拍得很好。
They should be home by now. 照說他們現(xiàn)在應(yīng)當(dāng)已經(jīng)到家了。
7.would
1）表意愿。
They would not let him in because he was poorly dressed. 他們不讓他進(jìn)去因?yàn)樗轮婆f。
I said I would do anything for you. 我說過我愿意為你做任何事。
2）表委婉地提出請(qǐng)求、建議或看法。
Would you like another glass of beer？ 再來杯啤酒好嗎？
Would you mind cleaning the window？ 請(qǐng)把窗戶擦一下好嗎？
They wouldn't have anything against it. 他們不會(huì)有什么反對(duì)意見。
3）表過去反復(fù)發(fā)生的動(dòng)作或過去的一種傾向。
Every time she was in trouble，she would go to him for help.
她每遇到麻煩都會(huì)向她求助。他告訴我盒子打不開了。
8. ought to
1）表義務(wù)，意為“應(yīng)該”（因責(zé)任、義務(wù)等該做），口氣比should稍重。
You are his father. You ought to take care of him. 你是他父親，應(yīng)當(dāng)管他。
You oughtn't to smoke so much. 你不應(yīng)該抽這么多煙。
2）表推測，暗含很大的可能，語氣較弱。
Han Mei ought to know his telephone number. 韓梅該知道他的電話號(hào)碼。
There's a fine sunset； it ought to be a fine day tomorrow. 今天有晚霞，明天應(yīng)該是個(gè)好天。
9. used to
表示過去的習(xí)慣動(dòng)作或狀態(tài)，現(xiàn)在不復(fù)發(fā)生或存在。疑問式和否定式有兩種。
He used to live in the countryside，but now he lives in the city.他過去住在鄉(xiāng)下，現(xiàn)在住在城里。
There used to be a building at the street corner，but it has been pulled down.
街道拐角處過去有座樓房，現(xiàn)在拆了。
I usedn't （didn't use） to smoke. 我過去不抽煙。
Used you （Did you use） to go to school on foot？ 你過去常步行去學(xué)校嗎？
（一）need和dare的用法
need和dare既可用作情態(tài)動(dòng)詞，也可用作實(shí)義動(dòng)詞。用作情態(tài)動(dòng)詞時(shí)，主要用于否定句和疑問句。用作實(shí)義動(dòng)詞時(shí)，可用于各種句式。
1.用作情態(tài)動(dòng)詞
——Need I come？ ——Yes，you must. ——我需要來嗎？ ——需要。
You needn't telephone him now. 你現(xiàn)在不必打電話給他。
I don't think you need worry. 我想你不必發(fā)愁。
She dare not go out alone at night. 她晚上不敢一個(gè)人出去。
How dare you say I'm unfair？ 你竟敢說我不公平？
Not one of them dared mention this. 他們誰也不敢提這件事。
2.用作實(shí)義動(dòng)詞
You don't need to do it yourself. 你不必親自做這件事。
We need to tell them the news. 我們需要把這消息告訴他們。
The table needs painting （to be painted.）。 桌子需要油漆一下。
We should dare to give our own opinion. 我們要敢于提出自己的觀點(diǎn)。
He did not dare （to） look up. 他不敢抬頭看。
I dare day he'll come again. 我想他會(huì)再來的。
（I dare say…為固定習(xí)語）
（二）情態(tài)動(dòng)詞后跟完成式和進(jìn)行式的用法
1.情態(tài)動(dòng)詞后跟完成式，表“應(yīng)當(dāng)已經(jīng)……”，“想必已經(jīng)……”，“本來可以……”等意。
I should have finished the work earlier. 我應(yīng)當(dāng)早一點(diǎn)完成這項(xiàng)工作的。
He isn't here. He must have missed the train. 他還未到，一定是沒趕上火車。
Where can （could） he have gone？ 他能到那里去了呢？
You may （might） have read about it. 你可能在報(bào)上已經(jīng)讀到這件事了。
You could （might） have been more careful. 你本來可以更細(xì)心的。
He needn't have worried about it. 他本不必為此事?lián)摹?BR> There was a lot of fun at yesterday's party. You ought to have come，but why didn't you？
昨天的聚會(huì)非常有意思。你本應(yīng)該來，為何不來呢？
2. 情態(tài)動(dòng)詞后跟進(jìn)行式，表示“想必正在……”，“可能正在……”，“應(yīng)當(dāng)正在”等意。
It's twelve o'clock. They must be having lunch. 現(xiàn)在是十二點(diǎn)。他們一定正在吃飯。
They may be discussing this problem. 他們可能正在論討這個(gè)問題。
He can't be telling the truth. 他說的不可能是真話。
She shouldn't be working like that. She's still so weak. 她不應(yīng)當(dāng)那樣干，她身體仍那么虛。