Unit 3 Healthy Eating Using language带课文解析课件-高中英语人教版选择性必修第二册.pptx

Healthy Eating;1. What do you think makes up a healthy diet?;2. What are some rules for healthy eating?;Read the passage and then match the subheadings with the paragraphs.;There is much debate nowadays as to what makes up a healthy diet. For example, scientists have insisted for years that a big enemy of health is fatty food. However,there is increasing evidence that the real driver of poor health is not so much fatty food, as it is sugar. Heart disease is the number one killer of Americans. And in America, people who receive 25% of their daily calories or more through sugar are twice as likely to die from heart disease than people who receive less than 10% a day (Journal of the American Medical Association, 2014). This is true regardless of how healthy the rest of their diet might be.Put more simply, while people continue to argue over whether or not fatty food is dangerous, we already know that sugar is a killer.;?归纳拓展 ①在教材原句中that引导的是 同位语 从句。此时that在从句中不充当成分且无词汇意义,只起连接作用,但不能省略。另外,whether、what、who、how、when等也可以引导同位语从句。 ②在某些名词,如advice、demand、suggestion等后面的同位语从句要用虚拟语气,即谓语动词用“ should+动词原形”结构,其中 should 可以省略。;1 (2019江苏,25,)Scientists have obtained more evidence that plastic is finding its way into the human body. 考查名词性从句。句意:科学家已经获得塑料正在偶然进入人体的更多证据。设空处引导同位语从句,解释说明evidence的具体内容,且从句中不缺成分,故用that。 2 (2018课标全国Ⅲ,阅读理解C,)Wang believes traditions should not be sealed in glass boxes at museums. “That is only evidence that traditions once existed,” he said. 考查名词性从句。句意:王认为传统不应该被封在博物馆的玻璃盒里。他说:“那只是传统曾经存在过的证据。”evidence后面接的是由that引导的同位语从句,说 明evidence的内容。注意:that没有具体的意思,不充当任何成分,只起连接作用,但不能省略。 ;1.What is more likely to cause heart disease? A.Fatty food.　　　　　　 B.Roasted food. C.Meat. D.Sugar.;Much of this extra sugar comes from sweets and sweet drinks. The average American gets 1/3 of his or her sugar through sweet drinks alone. The American Heart Association recommends that we limit ourselves to less than 100-150 calories a day from sugar, which is less than what is usually con