人教版第八册Meeting your ancestors（Language points）.ppt

a. You must be aware that…主句后接由强调句和定语从句组成的宾语从句。 must是作为情态动词表示肯定推测, 译作“一 定, 肯定”。只用于肯定推测。 对现在或将来事实推测，用 “must do”。 You must be hungry after a long walk． 走了很长的路, 你一定很饿。 对正发生或进行的事进行推测, 用“must be doing”。 The light is on. He must be doing his homework now． 灯亮着, 他一定正在做作业。 对过去的事进行推测, 用“must have done”。 The ground is wet. It must have rained last night. 地是湿的, 昨晚一定下雨了。 此时, 应注意反意疑问句的构成。如果句中有表示过去的时间状语, 反意疑问句用“didn’t+主语”; 如果句中无表示过去的时间状语, 反义疑问句用 “haven’t/hasn’t+主语”。 He must have arrived here last night, didn’t he? 他一定昨晚就来这儿了, 不是吗? He must have arrived here, hasn’t he? 他一定来这儿了, 不是吗? b. aware adj．意识到的, 知道的。通常用作表语。 We should be aware that a lot of animals are becoming endangered． 我们必须清楚地认识到许多动物正濒临灭绝的危险。 be aware of sth. 知道；意识到 Though most smokers are aware of the dangers of smoking, they wont given up. c. it’s here that we… 是强调句,其基本句式是It is (was)+被强调部分+that (who)+句子其他部分。此结构强调的成分仅限于主语,宾语和状语。 It was your mother whom I met in the street． 我在街上碰到的是你的母亲。 It was in the street that I met your mother. 我是在街上碰到你母亲的。 It was she who had been wrong. 错的是她。 6. 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寒冷住在这些洞穴里。 assume vt. 1) to think that something is true although you have no proof of it 假定: 设想 The scientists assume that there are no animals on the moon．科学家设想月球上没有动物。 regardless of prep. 1) without being affected by different situations, problems, etc. 不管; 不顾 He climbed the building, regardless of the danger． 不管有多危险, 他还是爬上了大厦。 2) in spite of We will persevere regardless of past failures. 尽管以前我们失败过, 但仍要坚持下去。 8. That would have kept them warm, cooked the food and scared wild beasts away as well. 他们用这火取暖、做饭, 还能用火吓跑野兽。 9. We have been excavating laye