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1、表示推测的情态动词(Modals of Probability and Possibility) 1. 在英语中,表示对某件事物的确定程度,即表示推测的时候,我们通常会用到以下情态动词,must, might, could, may, cant, couldnt. 例如:Look at the picture, what do you think it is? (无论你认为图形表示什么,这都是一种猜测,你可以用以下的句子来回答。)eg. It could be a donut. (它可能是个炸圈饼)It might be a hat from above. 它可能是个从上面看的帽子。It mu
2、st be an eyeball. 它一定是个眼球。2. 根据确信程度的不同,你可以选择用不同的词。(1)2080 certain(Possible): could, might, mayYou can use could, might, may to 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. May shows that you are a littl
3、e more certain that something is true. 当你不确认某件事情是否是真实的,表示“可能”“或许”的意思时,可以用 could, might, may 来表示。may 表示可能性要稍大一些。如:Situation: Hes got a baseball hat on. 又如:Situation: She is wearing a white coat. (2)90certain (Probable): mustUse must to express probability (to show that you believe something is probab
4、ly true. 如果你非常确信某事是真的,就用 must. “一定是”“肯定是”eg. Situation: Hes wearing a baseball hat. Hes carrying a baseball glove. (推测) He must play baseball. 注意:must 只有在肯定句中才表示判断。在否定句和疑问句中,要用cant 和 can。must 可用来表示我们对某事确有把握(因为从逻辑上来说它是必然的)例如:Janes light is on. She must be at home. She cant be out. 简的房间里开着灯。她一定在家,不会出去
5、的。Mary must have some problem: she keeps crying. 玛丽一定有什么问题:她一直在哭。Theres the doorbell. It must be Dick. 门铃响了。一定是迪克。(3)100 certain(Certain):事实,无须推测,则不能用 could, might, must. If these are facts, you dont use could might or must. eg. Situation: Its in the middle of a baseball game. He is throwing a ball
6、to his teammate. He plays baseball. 3. 表示肯定的推测,句式为:主语情态动词动词(subject + modal + verb)eg. 注意(1)Jack could live here. (*情态动词后面必须用动词原形)而不是 Jack could lives here. ()(2)Alex might know him. 而不是 Alex mights know him. (情态动词没有人称和数的变化)(3)Shirley may be at home. 而不是 Shirley maybe at home. (maybe 不是情态动词,而是副词不能做谓语)4. 表示否定的推测,句式为:主语情态动词not动词。请注意表示否定的推测时,一般用 cant, couldnt. couldnt 表示非常的不可能,可能性极小。eg. Thats impossible! Tom couldnt be in Hong Kong. I saw him just a few minutes ago. He cant be there.