表示推測(cè)的情態(tài)動(dòng)詞

1、表示推測(cè)的情態(tài)動(dòng)詞（Modals of Probability and Possibility）1. 在英語中，表示對(duì)某件事物的確定程度，即表示推測(cè)的時(shí)候，我們通常 會(huì)用至U以下情態(tài)動(dòng)詞，must, might, could, may, can ' t, couldn ' t.例如：Look at the picture, what do you think it is?（無論你認(rèn)為圖形表示什么，這都是一種猜測(cè)，你可以用以下的句子來回答。）eg. It could be a don ut.（它可能是個(gè)炸圈餅）It might be a hat from above.它可能是個(gè)從

2、上面看的帽子。It must be an eyeball. 它一定是個(gè)眼球。2. 根據(jù)確信程度的不同，你可以選擇用不同的詞。(1) 20% 80% certain (Possible ) : could, might, mayYou can use could, might, mayto express possibility to show that you believe something is possible, but you are not very certain if it is true or not. You are making a guess. Mayshows tha

3、t you are a little more certain that someth ing is true.當(dāng)你不確認(rèn)某件事情是否是真實(shí)的， 表示“可能” “或許”的意思時(shí)，可以 用could, might, may 來表示。may表示可能性要稍大一些。如: Situation: He ' s got a baseball hat on.(a)He could play fcaseball. fb)H e might play baseball (i$He may play ta set all（確信度由弱到強(qiáng)分別是;（coulght-*- imy）More Certain又如：S

4、ituation: She is wearing a white coat.(a) She could be a doctor.(b) She mightbea docto 匸 (cf)Shemay bea doctor(2) 90%certain(Probable ) : mustUse must to express probability (to show that you believe something is probably true.如果你非常確信某事是真的，就用must. “一定是”“肯定是”eg. Situation:He' s wearing a baseball

5、 hat. He' s carrying a baseballglove.(推測(cè))二 He must play baseball.注意：must只有在肯定句中才表示判斷。在否定句和疑問句中，要用can't 和 can。must可用來表示我們對(duì)某事確有把握(因?yàn)閺倪壿嬌蟻碚f它是必然的)例如:t be out.Jane' s light is on. She must be at home. She can房間里開著燈。她一定在家，不會(huì)出去的。Mary must have some problem: she keeps cryi ng.瑪麗一定有什么問題:她一直在哭。The

6、re' s the doorbell. It must be Dick.(3) 100% certain ( Certain ):事實(shí)，無須推測(cè)，則不能用 could, might,must.If these are facts, you dont use could might or must.eg. Situation:It ' s in the middle of a baseball game. He is throwinga ball to his teammate. He plays baseball.3. 表示肯定的推測(cè)，句式為：主語+情態(tài)動(dòng)詞+動(dòng)詞( subje

7、ct + modal + verb)eg.注意(1) Jack could live here.（*情態(tài)動(dòng)詞后面必須用動(dòng)詞原形）而不是 Jack could lives here.(x)(2) Alex might know him.（情態(tài)動(dòng)詞沒有人稱和數(shù)的變化）（maybe不是情態(tài)動(dòng)詞，而是副詞不能做而不是 Alex mights know him.(3)Shirley may be at home.而不是 Shirley maybe at home. 謂語)4. 表示否定的推測(cè)，句式為：主語+情態(tài)動(dòng)詞+ not +動(dòng)詞 請(qǐng)注意表示否定的推測(cè)時(shí)，一般用 can' t, couldn ' t. couldn 't表示非 常的不可能，可能性極小。eg. That