1、would :1.表will的過去，用于過去將來時2. 表意愿,樂意做某事3. 虛擬語氣could: 1.表can的過去，表過去的能力2表請求（婉轉語氣）3. 表猜測:可能是4. 虛擬語氣should: 1.表shall的過去,用于過去將來時，搭配第一人稱2. 表婉轉的語氣：應該做3. 虛擬語氣might: 1. may的過去,表猜測:可能是2. 表許可（婉轉語氣）may:1.表猜測：可能是2. 表許可think of想起,想到;沒有think from 的用法一. shall和will的用法1、 shall用在第一、三人稱，will用于第二人稱表示征求意見”Shall I go now?Sh

2、all we in vite her, too?Will you help me with the work?Shall the reporters wait outside or what?2、shall表示依據規定有義務去做。Passe ngers shall not talk with the driver while the bus is moving.3、shall用于所有人稱，表示說話人的許諾、威脅、警告、命令等。You shall have an an swer by tomorrow.If he s good, he shall have a new watch for Chr

3、istmas.If you children don t do as I tell you, you shan t go to the party.4 would可以表示過去的習慣（would可表示反復發生的動作或某種傾向。used to表示過去的習慣動作或狀態，強調現在已不存在）He would come to see me on Sun day whe n he was here.The dog would lie there in the sun all after noon.Whe n we were childre n, we would go skati ng every wi n

4、ter.5、will可以表示 愿意”而非將來：I will pay you for it.我會付給你錢買下它的。Go where you will.到你愿意去的地方。we re going on a cl imbing trip. Come if you will.6、will可以表示傾向、習慣（總是會，老是等意思）Sometimes the cat will lie there all morni ng.Oil and water will not mix.This machine won t work.二、can/could 的用法1、表示具備某種能力。The nin e-year old

5、 boy can swim across the river.Can you swim across the river?We couldn t get the truck to start.2、 表示 征詢對方意見”和允許”（could語氣委婉）。回答不用 could.Can /could I smoke here? Yes, you can. No, you cannot.Could you tell me where Joh n is?3、表示 可能性”（否定句疑問句常見，肯定句也可以）Can /Could it be true? 那會/可能是真的。That can t/couldn t

6、 be那不可能是真的。Will you answer the phone? It could be your mother.三. may/might 的用法1、表示征詢對方意見”和允許”。May I turn on the TV?Yes, of course. Yes, you can/may.No, you can t/may not /mustn t /I m afraid not.You may go home now.2、 表示可能性，也許”常用于肯定句。You may/might have some fever.你也許發燒了。He said that the news might b

7、e true.他說這消息可能是真的。They may/might be hav ing a bath.他們也許正在洗澡。四. must的用法1、表示必須Patients must use medicine according to the doctorders. s or2、 表示推測，只用于肯定句。在否定句或疑問句中，用can /could :There must be a mistake.Can /Could there be a mistakeThere can t/couldn t be a mistake.He must be over sixty now.They must be

8、watch ing the n ews now.They can t/couldn t be watching the news now.3、注意must的回答：Must the ladies wear dresses?yes, they must. No, they don t have to. / they needn t.Can/May I come in? No, you can t / mustn t.4 .表示禁止。Children mustn t go across the street alone.五. 表示 推測”的表達法總結（1）表示對現在和將來狀況的推測：must 一定，

9、may可能，might也許，can t 不可能。（2） 對已經過去的情況的推測，用情態動詞+ have+ done ”結構： must have done過去一定已經 （只用于肯定句中） can t / couldn t have done過去不可能-（表示否定） may/might have done可能已經- needn t have done 本來不必做- could have done那時本來可以（在肯定句中，不可用 can） should have done 本來應該做-（實際未做） shouldn t / oughtn t to have do本不應該做 （實際做了）例如：He m

10、ust have bee n drinking beer. 他肯定一直喝啤酒來著。The money can t have been lost there.錢不可能是在那兒丟的。He may have gone to bed. 他可能已經上床睡覺了。She might not have settled the problem.她可能尚未解決那個問題。We could have solved the problem in a more reas on able fashi on.You should have come here ten minu tes earlier.She should /

11、 ought to have gone there alone.六、need的用法1、作為情態動詞，need 一般只用于否定句和疑問句中。You needn t try to explain. Need we stay here this evening?2、Need作為實意動詞可用在所有句型中。She n eeds to come tomorrow.You don t need any help from others.Do they need this?七、dare的用法1 做情態動詞，通常用于疑問句，否定句和條件狀語從句中。Dare he swim across the river?He

12、 dare not come to see me.How dare you be so rude!你竟敢如此無禮！2 .做實意動詞：Do you dare to ask her? 你敢問她嗎？He didn t dare to go他不敢去。八、should/ought to 的用法兩者大多數情況下可以互換。1、表示道義上的責任，義務或要求，有時表示勸告。如:You ought to /should pay more atte nti on to what your lawyer says.This word is spelt wron gly. There should be ano the

13、r“ s ”.2. 表示推測和可能性，是 應該”之意。This pen ought to /should be yours.這支筆應該是你的。If the train is up to time, John should/ought to be here any minute now. 如果火 車晚點的話，John現在馬上就應該到了。3、表示講話人驚奇，失望，憤怒等感情：What s happe ned to that mon ey? How should I know?那些錢怎么了？我怎么知道？It s strange that he should have lost his temper

14、for such trivial things as that. 真奇怪，他竟然為這么小的事情發脾氣。Why should I believe you?我為什么要相信你？think ofv.考慮，關心，想起，想象，有的看法，記起think ofthink of (about),dream of (about)thi nk of (about)可以用來表示對問題的看法或考慮某件事： 表示認為”時，不用進行時態I think of it as impossible.我認為這是不可能的。What do you think about it?你認為這件事怎么樣？I think that the doc

15、tor had better see you.我想最好還是請醫生來看看你。表示計劃或想法時可以用進行時態。She threw the bottle into the sea. She never thought of it again. 她把那只瓶扔進海里，從未再想起它。Im thinking of going to university next year.我在考慮明年上大學。dream of (about)的含義是考慮那些自己認為不會發生的事”，這時應當用介詞 of，在表示夢中看到什么”時，通常用about。表示夢中見到。I dreamed about you last ni ght.我昨夜里夢到你了。He ofte n dream