（人教版）高中英语选修八：Unit 5 Meeting your ancestors语言点及其练习

Unit 5 Meeting your ancestors语言点 学习目标 重点词汇 alternative, tentative, interrupt, 　　acute, 　 assume,　ample, primitive, analysis,　sharpen, somehow, applaud, accelerate, arrest　 　 重点短语 regardless of, 　at most, 　cut up,　　 be/ get fed up with, 　look ahead, 　date back to 重点句型 情态动词+ have done if only 知识讲解 重点词汇 alternative 【原句回放】Can you think of the alternatives we would use today? 你们能想得出来今天我们用什么来替代这些东西吗？ 【点拨】alternative n. 替换物 常用搭配：have no alternative but to do sth. 除......外别无选择；只有，只好 There are some alternatives to our plan. 有几种方案可以代替我们的计划。 He had no alternative but to go there alone. 他别无选择，只好一个人去那儿。 【拓展】alternative adj. 随便一个的；二者择一的，供替代的 The way was blocked, so we went by an alternative road. 这条路被挡住了，因此我们走了另一条路。 tentative 【原句回放】Make a tentative guess about what Peking Man may have done and used thousands of years ago. 试着猜猜几千年前“北京人”可能做的事情和使用的东西。 【点拨】tentative adj. 试探性的，不确定的 常用搭配：make a tentative suggestion提出试探性的建议 reach a tentative conclusion得出暂时的结论 He still held a tentative relationship with Mary. 他还和玛丽保持着若即若离的关系。 Could we make a tentative appointment for Friday? 我们能暂时先约在星期五吗? 【拓展】tentatively adv. 试探地，犹豫不决地 interrupt 【原句回放】I’m sorry to interrupt you but how could they live here? 很抱歉打断你，请问他们怎么能够生活在这个地方呢？ 【点拨】interrupt vt. 阻断，打岔 常用搭配：interrupt the path 阻断道路 interrupt sb’s speech 打断某人的讲话 interrupt traffic 中断交通 interrupt the view 遮住视线 　　Traffic in the city was interrupted by a snowstorm. 城市交通被暴风雪阻断了。 　　Don’t interrupt me when I am busy. 我忙着时不要打扰我。 【拓展】 interruption n. 中断，打断，干扰 　　常用搭配：without interruption 不间断地, 继续不断地 　　The big earthquake caused the interruption of communication, traffic, service and so on. 　　大地震引起了通讯、交通、服务等等的中断。 　　Numerous interruptions have prevented me from finishing the work. 　　大量的干扰阻止了我完成工作。 acute 【原句回放】You are an acute observer. 你是个敏锐的观察者。 【点拨】acute adj. 敏锐的；严重的；深刻的 He suffers from acute depression. 他患有严重的抑郁症。 The housing shortage is more acute than first thought. 住房短缺比最初想的要严重。 Simon’s vague manner concealed an acute mind. 西蒙含糊的风格隐藏了他敏锐的头脑。 【拓展】常用短语：acute infection 急性感染 acute observer 敏锐的观察家 acute shortage 严重短缺 assume 【原句回放】So we think it is reasonable to assume they lived in these caves, regardless of the cold. 因此，我们有理由认为他们不顾严寒，就住在这些洞穴里。 【点拨】assume vt. 假定，设想；假装；呈现出；担任 常用搭配：assume a leading position 担任领导职务 assume a look of surprise 装出吃惊的样子 assume sb (to be) ...认为某人是…… It is generally assumed that...普遍认为…… I assume you always get up at the s ... ...