高中英语情态动词教案

情态动词 情态动词是高考的重点考查项目，对学习情态动词的要求是： 首先、了解情态动词各自的基本意义及用法，然后掌握情态动词表示推测的用法（其中重点是对表过去推测的用法）还要注意带有情态动词的反意疑问句的用法。 情态动词的特征： 1.本身有词义，但完全。因此不能独立作谓语，只能和动词原形一起构成谓语。 2.后接动词不定式一律不带to 3.不随人称和数的变化。 情态动词各自的基本意义及用法 表一、can 与could用法对比表 对比点 can could 1、表“能力” Can you lift this heavy box? I couldn’t understand what he said at all. 2、表“许可” You can use a different material instead. He said I could borrow his bike. 3、“怀疑” No, no, it can’t be true. What on earth can this mean? We thought the story could not be true. How could you be so careless? 4、can与be able to 区别 1. could代替 can，表示语气更为婉转。 Eg. Could I use your bike? Yes, I can 2. can (能够)=be able to(仅表能力时)，但be able to 表示一番努力后，才能做得到，且有更多的时态。 He was a good swimmer, so he __________ swim to the river bank when the boat sank. A. could B. might C. shall D. was able to 表二、may与 might用法对比表 对比点 may Might 1．表“询问” May I …?(=Can I …?) Might I …?(=Could I…?)(但比用may 更客气) 2.表“允许” You may take the boy there. He told me he might come .(might