高中英语必修四：unit2 Grammar and usage 教案.docVIP

Unit 2 Sports events Grammar and usage Modal verbs: general introduction comparisons Teaching Aims: 1. Show Ss that modal verbs can be used to talk about ability, obligation, certainty or permission, to make requests, suggestions, offers and to give advice. 2. Enable students to understand that some modal verbs can be used with the continuous form and the perfect form to talk about current affairs or past actions. Teaching Important Points: 1. Develop the students’ ability of using modal verbs. 2. How to make students master the usage of modal verbs. Teaching Difficult Points: Develop the students’ ability of using modal verbs and how to make students master the usage of modal verbs. Teaching Methods: Explanation and exercise Teaching Procedures: Step 1 Warming up Say some sentences to warm up students: Now, many of us can speak English quite well, but a few years ago, we couldn’t. Yes or no? If we talk about the ability someone has, we use the modal verb ‘can’. If we want to express that it is necessary for us to do something, what modal verb do we use? must What other modal verbs can you think of? Step 3 Presentation Show the usage of the modal verbs on the screen. Modal verbs can/could表能力 (1) I don’t think he can solve the problem without any help. (2) Can you help me to work out this maths problem? ought to/should 1.表示义务，“应该”，用于各种人称 You should respect your parents. You shouldn’t spend much time surfing the Internet. 2.表示推测，“想必，估计”的意思。 If Tom starts today, he should complete the project in time. 3.表示与想象的不一样”照说应该……” ● I wonder where Mike is. He should be here now. ● You shouldn’t have told David what Mike told you. 4. 在表示建议, 命令, 要求动词后用虚拟 语气。 1) My friends suggested that I (should) pay visit to shanghai next month. 2) The chairman demanded that we (should) solve the problem at once. 5. 表示惊讶, 忧虑, 惋惜等感情色彩。 ● I am really surprised that he should talk to his parents that way. ● Rose should turn him down. ● Rose ought to/will /must give me a han