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新概念英语第一册Lesson29-30Teaching contents:a. New words and expressionsshut v. 关门bedroom n. 卧室untidy adj. 乱，不整齐must modal verb 必须，应该open v. 打开air v. 使…通风，换换空气put v. 放置clothes n. 衣服wardrobe n. 大衣柜dust v. 掸掉灰尘sweep v. 扫empty v. 倒空，使――变空read sharpen put on take offb.SentencesCome in.Open the windows and air the room.Put the clothes in the wardrobe.Make the bed.Dust the dressing table.Sweep the floor.c. Grammar情态动词：must、can、may、need它是一种具有实际意义的助动词。
情态动词不能单独做谓语，只能和后面的原形动词一起构成谓语。
情态动词没有人称和数格的变化。
含有情态的句子，否定句和疑问句都是在情态动词上发生变化。
open the windown 打开窗户You must open the window.They must shut the door.You mustn’t open the windows.Must I open the window?Yes, you must.No, you needn’t.What must I do?What must they do?祈使句：又称之为无主句，所有的祈使句都省略了主语You祈使句的否定句就是在句子前加don’tStand upSit downCome inPut these clothes in the wardrobe.Procedures:StepI Greeting and reviewStep II Lead-in & New words presentationshut v.关门close 口语: shut the door close the doorbedroom n.卧室kitchen living room bathroomuntidy adj.乱，不整齐tidy整齐un 表否定含义的前缀unhappy happy unlucky luckyopen v.打开air v.使――通风，换换空气n. 空气open-air a. 户外的open-air sport 户外运动Air the room. 给房间通风air-conditioner 空调air express 航空邮件、包裹fish in the air 水中捞月put v.放置put heads together 集思广义clothes n.衣服some clothes clothes tree 衣帽架cloth 布料wardrobe n.大衣柜dust v. 掸掉灰尘dust the tablesweep v.扫sweep the floorclean adj.干净的v. 使――干净（泛指）clean the blackboard/your shoes clear v. 清除clear the disher/snowempty v. 倒空，使――变空read v.读read a mapsharpen v.削尖，使锋利put on 穿上，戴上Put on your coat/shoes.take off 脱掉，摘下Take off your coat/shoes.put off 推迟turn on 开（电灯）Turn on the stereo.turn off 关（电灯）Turn off the stereo.turn on/off+ the stereo（电源）/the tap（水源）/the gas（煤气）turn on the television open the television 打开电视后盖根据图片演练Lesson 28句型What must I do?must modal verb. 必须，应该You must open the window. 你必须打开窗户。
