Unit22 Environmental Protection Language StudyUnit 22 Environmental Protection Lesson3 Natural DisastersLanguage StudyStep 1:Learning Aims:(学习目标)To translate the text.To learn some important phrases and sentence patterns. Important and Difficult Points:(重难点)To master the usages of some important words ,phrases and sentence patterns.Step2: Check preview（检查预习）Check if students have remembered important words and phrases.Step3:Self-study and Cooperating （自主学习、合作探究）重点句式探究1.The last few years have seen environmental disasters on a grand scale, and experts are predicting far worse to come.在过去的几年里,许多大规模的自然灾害发生了,专家预测形势将更为严峻。 本句的主语是 the last few years,谓语动词是 have seen。像这样以时间、地点等名词作主语的句子,常用 see, find, witness 等动词作谓语,此时构成动词拟人化的用法。1949 saw the founding of the People’s Republic of China.1949 年中华人民共和国成立了。Rome witnessed many great historic events.在罗马城发生了许多重大的历史事件。20 世纪发生了两次世界大战。______________________________________________________________________单句填空—Recent years (see) rapid change of my hometown. —Yes, I could hardly recognize it when I arrived yesterday.2.Storms have been getting worse everywhere too, with a growing number of hurricanes hitting the US, and Central America.随着飓风不断地袭击美国和美洲中部,暴风雨给各地带来的灾害也变得更加严重。 本句使用了现在完成进行时。现在完成进行时是由“have / has+been+现在分词”构成的,可以表示从过去某时开始一直延续到说话时还在进行,或可能还要继续下去的动作,还可以表示从过去某时开始,一直延续到说话时刻,可能刚刚结束的动作。She has been burning the midnight oil to prepare for GRE.她最近在熬夜准备 GRE 考试。The old man has been repairing cars for thirty years.老人修车修了三十年了。What happened to you? Have you been crying?你怎么...
