新课标人教版选修八Book8 Unit5 Language points.pptVIP

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”。 走了很长的路, 你一定很饿。 You must be hungry after a long walk． 对正发生或进行的事进行推测, 用“must be doing”。 灯亮着, 他一定正在做作业。 The light is on. He must be doing his homework now． 对过去的事进行推测, 用“must have done”。 地是湿的, 昨晚一定下雨了。 The ground is wet. It must have rained last night. b. aware adj．意识到的, 知道的。通常用作表语。 我们必须清楚地认识到许多动物正濒临灭绝的危险。 We should be aware that a lot of animals are becoming endangered． be aware of sth. 知道；意识到 虽然很多烟民知道吸烟的危害，但还是不戒烟。 Though most smokers are aware of the dangers of smoking, they wont give 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。 4. 因此我们有理由认为他们不顾寒冷住在这些洞穴里。 So we think it is reasonable to assume they lived in these caves, regardless of the cold． assume vt. 1) to think that something is true although you have no proof of it 假定： 设想 we assume that everyone invited will turn up． 2) to pretend 装作 She assumed a look of surprise． 她装出一副吃惊的样子。 regardless of prep. 1) without being affected by different situations, problems, etc. 不管; 不顾 He went ahead and did it, regardless of the consequence. 8. 他们用这火取暖、做饭, 还能用火吓跑野兽。 That would have kept them warm, cooked the food and scared wild beasts away as well. 6. We have been excavating layers of ash almost six metres thick, which suggests that they might have kept the fire burning all winter. 我们一直在挖掘一层层的积灰, 几乎有六米厚, 这说明他们可能整个冬季都在烧火。 a. “have been excavating”是现在完成进行时, 表示从过去开始一直延续到现在, 强调动作的继续。 我已经找了三天我丢的书, 但仍没找到。 I have been looking for my lost book for three days, but I still haven’t found it. b. 句中 “ which” 用来引导非限制性定语从句, 先行词为其前的句子。 c. suggest vt. to make evident indirectly; imply 意为“暗示, 意味, 表明” 她苍白的脸色表明她病了。 Her pale face suggests that she was ill. 他的无礼反映了他缺乏家教。 His bad manners suggest a lack of family education 我建议她马上回家