冀教版九年级上册英语课件：unit1 Lesson4：Don’t Smoke，Please！ (共10张PPT)

疑难阐释 1.He’s been away for three days now. 他离开已经三天了． 本句使用现在完成时,句中使用了持续性动词be away from….它的瞬间动词是leave． 　When did you leave school? Three years ago. Can you tell me how long we are going to be away? I’ve been away from school for 7 years. 2.He must be ill.他一定病了． must表示推测“一定”,只可以用于肯定句中， 在变为否定句和疑问句中需换用can.例如: He must be in the reading room now. He must have lots of money. He must be travelling abroad. Can he be ill? He can’t be ill. 3.On Wednesday,I rested and drank plenty of water. 在周三,我休息了一下还喝了许多水. (1)句中rest是休息,会构成短语:have a rest. (2)plenty of 大量的,既可修饰可数名词又可 修饰不可数名词,等同于a lot of或lots of. 4.Did you know that our great grandfather had lung disease? 你知道我们的曾祖父得了肺病吗？ 5.A lot of people would live longer if they didn’t smoke. 许多人如果不吸烟寿命会更长． 6.Smoking is also bad for your heart. 吸烟对心脏也不好． 　(1)辩析：smoking和smoke smoking 作名词用时,意为“吸烟;抽烟”.例如: Smoking is bad for y