情態動詞-使用情態動詞的句子的時態如何體現
情態動詞有一定的詞義,表示說話人的語氣和情態。
情態動詞只能與動詞原形一起構成謂語。 情態動詞的種類主要有: 原形 can 過去式 could 詞意:能夠 原形 may 過去式 might 詞意:可以,也許 原形 must(have to ) 過去式 must(had to) 詞意:必須 原形 need 過去式 needed 詞意:需要 原形 dare 過去式 dared 詞意:敢于 原形 shall 過去式 should 詞意:應該 原形 will 過去式 would 詞意:愿意 原形 ought to 過去式 ought to 詞意:應該 再說明一下,情態動詞沒有人稱和數的變化。
must,ought to 的過去式與其原形相同。shall,should,will,would在一定場合下也可用作情態動詞。
情態動詞在否定句和疑問句中的用法,是與助動詞相同的。 can,在表示允許,許可(與may意思相近)時,用can,could,may,might表示,它們沒有時間上的差別,而是could比can,might比may在語氣上更委婉一些。
may比can正式一些,在書面語中較常用may或might。 例如: Excuse me,could you tell me how to get to the post office? (打擾一下,您能告訴我怎么去郵局嗎?)句中的could,并不是過去式。
請幫我舉出10個帶有情態動詞的英語句子
You can do it.
He can't cook the meal.
Can she sing that song?
We must follow the traffic rules.
You mustn't hit others.
Must I wash my hands before lunch?
You should finish your homework on time.
He shouldn't shout at his parents.
Should they go to the concert?
She said that she could write the articles.
以上的can,can't,must,mustn't,should,shouldn't,could等單詞均為情態動詞。
情態動詞的句子怎么轉換成被動語態啊舉五個例子,要寫出含情態動
那就舉幾個例子看看吧.(其實規則就是:在情態動詞后加上be,再將謂語動詞(實義動詞)變成過去分詞,其余就是平常的被動語態轉換,即將原句中的賓語變成主語,原句中的主語加上by之后變成狀語.)*u must finish homework before supper.改被動語態:Homework must be finished (by you) before *Parents should teach children no later than 3 years old.改被動語態:Children should be taught by parents no later than 3 years * toThey have to hold a meeting in the park.改被動語態:A meeting has to be held by them in the *y can carry that bookshelf easily.改被動語態:That bookshelf can easily be carried by *m needs to train this dog everyday.改被動語態:This dog needs to be trained by Tom everyday.希望可以幫助到你理解吧。
情態動詞造句
* may come anytime you want.
Student may not sleep in class
2.I would go to Norway one day.
I would not choose this color.
* should respect your teacher.
You should not make noise when the baby is sleeping.
4.I can speak 3 languages.
I can not finish it in 1 hour.
* must finish your homework before playing with the dog.
You must not eat it up if you are full.
供你參考,希望能夠幫助你,希望你不要直接抄,把它看懂.祝你好運.
情態動詞有很多句子里后面都加be是什么意思
情態動詞后面加動詞原形,因為am, is , are的原形是be,因此情態動詞后面加be動詞。
be動詞從語法上說在主系表結構的句子中,am is are的時態是變化的,但情態動詞后面加動詞原形。例如情態動詞,can could should shall 后面加動詞原形,be動詞 am is are 的動詞原形是be
所以情態動詞+be.
當謂語是表狀態時,用be動詞+表語一起作謂語,這時be動詞可變形。情態動詞不能單獨作謂語,后須接行為動詞或be動詞的原形一起作謂語。
例句:He must be her brother. 他一定是她的哥哥。
擴展資料:
可以表推測的情態動詞有:must, will, would, ought to, should, can, could, may, might,除了can只用于現在或過去時間外,其它各詞都可以對過去、現在或將來的情況或時間做出猜測。
1、對現在或將來的情況進行猜測,用情態動詞+do/be,例如:
He may/ might come tomorrow. 他明天可能會來。 He may/ might know it. 他可能知道這件事。
2、對現在或將來正在進行的情況進行猜測,用情態動詞+be doing,例如:
He may/ might be waiting for you now. 他可能正在等你。
He may/ might be waiting for you when you get there tomorrow. 明天你到那里時,他可能會在等著你。
3、對過去或已發生的情況進行猜測,用情態動詞+have done,例如:
He may/ might have arrived in Beijing by now. 他現在估計已經到北京了!
He must have finished his homework. 他一定已經完成作業了!
4、對過去進行或現在完成進行的情況進行猜測,用情態動詞+have been doing,例如:
He might have been waiting for you when you phoned him. 你給他打電話時,他可能已在等你了。
情態動詞造句+意思,請各位高手幫忙,急
情態動詞用法歸納 情態動詞有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。
情態動詞無人稱和數的變化;不能單獨使用,必須與其后的動詞原形構成謂語 一、 can, could 1) 表示能力(體力、知識、技能)。 Can you lift this heavy box?(體力) Mary can speak three languages.(知識) Can you skate?(技能) 此時可用be able to代替。
Can只有一般現在時和一般過去式;而be able to則有更多的時態。 I'll not be able to come this afternoon. 當表示“經過努力才得以做成功某事”時應用be able to,不能用Can。
如: He was able to go to the party yesterday evening in spite of the heavy rain. 2) 表示請求和允許。 -----Can I go now? ----- Yes, you can. / No, you can't. 此時可與may互換。
在疑問句中還可用could, might代替,不是過去式,只是語氣更委婉,不能用于肯定句和答語中。 ---- Could I come to see you tomorrow? ---- Yes, you can. ( No, I'm afraid not. ) 3) 表示客觀可能性(客觀原因形成的能力)。
They've changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 4) 表示推測(驚訝、懷疑、不相信的態度),用于疑問句、否定句和感嘆句中。 Can this be true? This can't be done by him. How can this be true? 二、 may, might 1) 表示請求和允許。
might比 may語氣更委婉,而不是過去式。否定回答時可用can't 或mustn't,表示“不可以,禁止”。
----Might/ May I smoke in this room? ---- No, you mustn't. ---- May/Might I take this book out of the room? ---- Yes, you can. (No, you can't / mustn't. ) 用May I。?征徇對方許可時比較正式和客氣,而用Can I。
?在口語中更常見。 2)用于祈使句,表示祝愿。
May you succeed! 3) 表示推測、可能性(不用于疑問句)。 might不是過去式,它所表示的可能性比may小。
* may /might be very busy now. * mother may /might not know the truth. 三、 must, have to 1) 表示必須、必要。 You must come in time. 在回答引出的問句時,如果是否定的,不能用mustn't(禁止,不準),而用needn't, don't have to(不必). ---- Must we hand in our exercise books today? ---- Yes, you must. ---- No, you don't have to / you needn't. 2) must是說話人的主觀看法, 而have to則強調客觀需要。
Must只有一般現在時, have to 有更多的時態形式。 1. he play isn't interesting, I really must go now. 2. I had to work when I was your age. 3) 表示推測、可能性(只用于肯定的陳述句) 1. You're Tom's good friend, so you must know what he likes best. 2. Your mother must be waiting for you now. 四、 dare, need 1) dare作情態動詞用時, 常用于疑問句、否定句和條件從句中, 過去式形式為dared。
1. How dare you say I'm unfair? 2. He daren't speak English before such a crowd, dare he? 3. If we dared not go there that day, we couldn't get the beautiful flowers. 2) need 作情態動詞用時, 常用于疑問句、否定句。在肯定句中一般用must, have to, ought to, should代替。
* needn't come so early. 2. ---- Need I finish the work today? ---- Yes, you must. / No, you needn't. 3) dare和 need作實義動詞用時, 有人稱、時態和數的變化。在肯定句中,dare后面常接帶to的不定式。
在疑問句和否定句中,dare后面可接帶to或不帶to的不定式。而need后面只能接帶to的不定式。
1. I dare to swim across this river. 2. He doesn't dare (to) answer. 3. He needs to finish his homework today. 五、 shall, should 1) shall 用于第一人稱,征求對方的意見。 What shall we do this evening? 2) shall 用于第二、三人稱,表示說話人給對方的命令、警告、允諾或威脅。
1. You shall fail if you don't work hard.(警告) 2. He shall have the book when I finish it.(允諾) 3. He shall be punished.(威脅) 六、 will, would 1) 表示請求、建議等,would更委婉。 Will / Would you pass me the ball, please? 2) 表示意志、愿望和決心。
1. I will never do that again. 2. They asked him if he would go abroad. 3) would表示過去反復發生的動作或某種傾向。would表示過去習慣時比used to正式,且沒有“現已無此習慣”的含義。
1. During the vacation, he would visit me every other day. 2. The wound would not heal. 4) 表示估計和猜想。 It would be about ten o'clock when she left home. 七、 should, ought to 1) should, ought to表示“應該”,ought to表示義務或責任,比should語氣重。
1. I should help her because she is in trouble. 2. You ought to take care of the baby. 2) 表示勸告、建議和命令。should, ought to可通用,但在疑問句中常用should。
1. You should / ought to go to class right away. 2. Should I open the window? 3) 表示推測 should , ought to (客觀推測), must(主觀推測)。 * must be home by now. (斷定他已到家) * ought to/should be home by now.(不太肯定) 3. This is where the oil must be.(直爽。