动词(非谓语情态)wei.ppt

连系动词+adj. /n. 连系动词本身有词义，但不完整，不能单独作谓语，必须跟表语一起构成合成谓语，说明主语的状态、特征、性质或身份。 连系动词可具体分为三类： 1、表示状态的动词be 2、表示“感觉”的词 3、表示“变”、“变成”的意思的词 1、表示状态的动词be be, stay, keep, seem 2、表示“感觉”的词，如look（看起来），seem(看起来似乎)，feel（觉得，摸起来），smell（闻起来），sound（听起来），taste（尝起来）等 3、表示“变”、“变成”的意思的词 如become, get, grow, turn, go, 解释为“变”、“变得” 情态动词 can, could, may, might, must, should , ought to, needn’t … 情态动词 can/may/must/needn’t 的基本用法： can: 能； 能够 may: 可以 must: 必须；应该 need: 不必 practice 1. I ________ speak a little English, but I _________ speak French. 2.Cars ______ stop when the traffic lights are red. 3.A:Must I finish my homework before supper? B: No, you __________. 4. .--Mum, I’ve finished homework._______ I go out and play for a while? -No, I’m afraid not. I have some other exercises for you. 5.-----Must I finish reading the book today? -----No. You ______________ to if you have something else to do. 6. You _________ play football in the busy street. It is too dangerous. 7. You ________ to buy an English dictionary. It is useful to you. 情态动词can/could表示“能力” Can用来表示现在的 能力 Could 用来表示过去的能力 比较can 和be able to 1.两者都可以用来表示能力。 2.can只有现在时(Can)和过去时 (could)，而be able to可用于多种时态。 can与be able to；不能重复使用 practice I _____________ come back in a few months. He _______________ get there before dark. He ______________ finish the work today. 5.The boy________ answer this kind of hard questions one year ago. 6. ________she ride when she was three years old? 7. ________you mend my car? I______ not start it. 8. I have my own room in my house, so I________do what I want in it. 9._________you play the piano when you were eight? practice 1. We are so busy that we ______ finish the task before tomorrow. 2. I forgot my key. I ________open the door just now. 5.Who is the man over there? Is it Mr Li? -No, it ________be him. Mr Li is much taller. 6.I __________ use the computer last year. I think it was too difficult for me at that time. 7.I want to