20122013科兴高复英语公开课第三次讲义.docVIP

科兴三校生高复免费公开课英语第三讲 上课时间：2012年5月19日上午9:30（每周六早9:30） 地点：四平路2158号609室 免费预约上课电话 Lecture 3 Model Verb 第三讲 情态动词 ■ Definition 情态动词表示说话人对动作或状态的各种观点和态度，如需要、猜测、意愿或怀疑等。 情态动词有词义，但不完全，是所谓的“辅助性”动词，在句中不能单独充当谓语。 ■ In general 情态动词 非推测性用法 推测性用法 can/could 表示“能力、许可” 表示“可能” may/might 表示“许可” 表示“可能” will/would 表示“意志” 表示“推测” should/ought to 表示“义务” 表示“必然” must 表示“义务” 表示“必然” I. can /could 肯定式 否定式 疑问式 现在式 can cannot/cant Can...? 过去式 could could not/couldnt Could...? 表示能力 I can ride a bicycle. Can you play the piano? He could speak English before he went to school. Could you swim when you were a child? She couldnt cook before she go married. She cant dance well. *can/could 和 be able to 都有表示“能够”的意思， 两者区别如下： 1)can/could 没有人称的变化，而 be able to 有人称和时态的变化。 2)表示在过去某个特定情况下成功做成某一具体的事情，只能用be able to, 不能用could。 We were able to solve the problem. (√) We could solve the problem. (X) 表示可能 He can be in the office, but Im not sure. You can find him on the playground. Can I get this book in the school library? I didnt see him in the classroom just now, he cant be there. It cant be true. Could you really come? 3.表示许可 Can I open the window? You can go home now. Im afraid you cant sit here. Can I ask you a question? Could I borrow your bicycle? II. may/might 肯定式 否定式 疑问式 现在式 may may not May ...? 过去式 might might not Might ...? * might 既可指过去，也可指现在。表现在时，might 比may 语气更委婉。 表示许可 (表示该用法时，比can/could 更正式） May I use your ruler? You may go first. You may not talk loudly. Might I take this chair? You might not make any noise. 表示可能 （比can/could 更不确定，might比may语气更弱） He may not know it. She might be on her way now. John may help you. III. must 肯定式 疑问式 否定式 备 注 must Must...? must not/ mustnt 表示“不可以” neednt /dont have to /dont need to 表示“不必” 表示义务，意为“必须” You must be back before 8 oc