情态动词--中考专题复习（无答案）

情态动词专项复习1 情态动词：具有一定词义，不能单独作谓语，必须和动词原形连用一起构成谓语。用来表示愿望、态度或推测等。 ★考点一：情态动词的情态意义 can can表现在或将来的能力“能；会” =be able to Sam can speak English. can表请求、允许，意为“可以”。 Can you come to my party? 否定：can’t，“不能” I can’t swim. could could表示过去的能力； Lily could play the piano well when she was young. Could在疑问句中表委婉请求， 回答用can --Could I have a cup of tea?  --Of course you can. 否定：couldn’t意为“不能”。 The little girl couldn’t dress herself. may may表示请求、允许，意为“可以”。 May I speak to John? 否定：may not might might表请求许可语气比may更婉 Might I speak here? must must表示义务、命令或必要，意为“必须”，强调主观看法。 I must finish my homework first. mustn’t 表示“不允许；禁止” You mustn't take photos in the museum.禁止在博物馆拍照。 have to have to“不得不”，强调客观需要。 I have to go to work every day. should should意为“应该”表义务或责任 We should clean the classroom every day. should还可以表示劝告或建议。 You should lie down and rest. 否定：shouldn’t，“不应该” All of us shouldn’t wast water. 我们所有人都不应该浪费水。 had better do had better do sth.“最好做某事”， 否定:had better not do sth. nee