1.英語中情態動詞前后應該跟什么
一般句式:主語+謂語+賓語,情態動詞只能充當謂語!eg(例如):I can speak English.例句中can為情態動詞,前面所接的就是主語 I (人),當然也可接某物或者某事,有一點,主語(也就是情態動詞前的)只能是名詞、動名詞(動詞+ing)、動詞不定式(To+動詞)!●那情態動詞后面接的就簡單了,直接加動詞原形,如上例中的speak,就沒加任何變化!●句型:主語+情態動詞+動詞原形eg:He(主語) can(情態) play(動原) the basketball.。
2.常用情態動詞的意思與用法
分類 情態動詞有四類: ①只做情態動詞:must,can(could),may(might)…… ②可做情態動詞又可做實義動詞:need,dare ③具有情態動詞特征:have(had,has) to,used to ④情態動詞表猜測編輯本段位置 情態動詞有一定的詞義,但并不完整,必須與動詞原形一起構成謂語. I can see you. Come here. 我能看見你,過來吧. He must have been away. 他一定走了. What can I do for you? 我能幫你嗎? How dare you treat us like that! 你怎能那樣對待我們! I wish I could fly. 好希望我可以飛翔啊.特點 情態動詞無人稱和數的變化, 情態動詞后面跟的動詞需用原形,否定式構成是在情態動詞后面加 "not". 個別情態動詞有現在式和過去式兩種形式, 過去式用來表達更加客氣, 委婉的語氣, 時態性不強, 可用于過去,現在或將來.情態動詞屬非及物動詞,故沒有被動語態. He could be here soon. 他很快就來. We can't carry the heavy box. 我們搬不動那箱子. I'm sorry I can't help you. 對不起,我幫不上你. 基本助動詞與情態助動詞最主要的區別之一是:基本助動詞本身沒有詞義,而情態助動詞則有自己的詞義,能表示說話人對有關動作或狀態的看法,或表示主觀設想: What have you been doing since? (構成完成進行體,本身無詞義) I am afraid I must be going. (一定要) You may have read some account of the matter. (或許已經) 除此之外,情態助動詞還有如下詞法和句法特征: 1) 除ought和used以外,其他情態動詞后面只能接不帶to的不定式.如果我們把ought to和used to看做是固定詞組的話,那么,所有情態動詞無一例外地只能接不帶to的不定式: We used to grow beautiful roses. I asked if he would come and repair my television set. 2) 情態助動詞在限定動詞詞組總是位居第一: They need not have been punished so severely. 3) 情態助動詞用于第三人稱單數現在時的時候,沒有詞形變化,即其詞尾無-s形式: She dare not say what she thinks. 4) 情態動詞沒有非限定形式,即沒有不定式和分詞形式,也沒有相應的動名詞: Still, she needn't have run away. 5) 情態助動詞的“時”的形式并不是時間區別的主要標志.在不少場合,情態助動詞的現在時和過去時形式都可以表示現在、過去或將來時間: Would you mind very much if I ask you to do something? She told him he ought not to have done it. 6) 情態助動詞之間是相互排斥的,即在一個限定動詞詞組中只能出現一個情態助動詞,但有時卻可以與have和be基本助動詞連用: You should have washed the wound. Well, you shouldn't be reading a novel.編輯本段用法 首先它是動詞,而且不同于行為動詞,行為動詞表示的是可以通過行為來表達的動作(如寫,讀,跑),而情態動詞只是表達的一種想法(如能,也許,敢). 用法是:情態動詞+行為動詞原形 例句:I can read this sentence in English. 我能用英語讀這句話. 情態動詞是一種本身有一定的詞義,表示說話人的情緒,態度或語氣的動詞,但不能單獨作謂語, 只能和其他動詞原形構成謂語. We can be there on time tomorrow.我們明天能按時去那兒. May I have your name? 我能知道你的名字嗎? Shall we begin now?我們現在就開始嗎? You must obey the school rules.你必須遵守校規. 情態動詞數量不多,但用途廣泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would),have (to) ,had better. 情態動詞還有一個很重要的用法,即情態動詞表推測—— 情態動詞表推測的用法小結 (一)情態動詞表推測的三種句式 1.在肯定句中一般用must (一定),can, could(可能),might /may(也許,或許). (1)He must/cab/may,might know the answer to this question? 他一定/可能/也許知道這個問題的答案. (2)It is cold in the room. They must have turned off the heating. 屋里很冷,他們肯定把暖氣關了. 2.否定句中用can't / couldn't(不可能), may not/might not(可能不). (1)It can't/couldn't be the headmaster. He has gone to America. 這不可能是校長,他去美國了. (2)He may not/might not know the scientist. 他也許不認識那位科學家. 3.疑問句中用can/could (能……?). (1)Could he have finished the task? 他可能把任務完成了嗎? (2)Can he be at home now? 他現在能在家嗎? 注:以上三種句式中情態動詞的語氣按程度都是依次遞減的.Might, could并非may, can的過去式,而表示語氣較為委婉或可能性較小. (二)情態動詞表推測的三種時態 1.對將來情況的推測,用“情態動詞 + 動詞原形”. (1)She must / may / might / could arrive before 5. 5:00前她一定/可能/也許到. (2)She must/may/might/could walk miles and miles among the hills without meeting anyone. 她一定/可能/也許會在山里一連走好幾英里而遇不到一個人. 2.對現在或一般情況的推測,用“情態動詞 + be”,“情態動詞 +be doing”或“情態動詞 + 動詞原形”. (1)He must / may / might / could be listening to the radio now. 他一定/可能/也許正在聽收音機. (2)He can't ( couldn't ) / may 。
3.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。
4.情態動詞有哪些規律
分四類 一、只做情態動詞 :must can(could) may(might)
二、可做情態動詞又可作實意動詞:need dare will 三、具有情態動詞特征:have(had,has) to,used to,ought to四、情態動詞表猜測:一肯一否三不定(must一肯,can not一否,may,might,could,三不定
mustn't代表強烈禁止 must表示主觀,have to表示客觀語氣逐漸減弱 can not 不一定 不能
may not可能不