UNIT 8 LITERATURE 第3课时 表达能力的优化升级（课件PPT）-【创新方案】2024高考英语一轮复习（新教材 新高考 北师大版）

开始 经典句式—学通更要用活 01 02 03 目 录 亮点写法—发现美才能创造美 随堂训练—语境迁移应用 2 1．it 作形式主语 (1)it代替不定式作形式主语 不定式(短语)作主语时往往主语太长，句子结构不平衡，此时可用it作形式主语，把不定式短语放在后面。常用于下列句型中： ①It＋is/was＋adj./n.＋to do sth.(不定式前可有其逻辑主语for/of sb.) ②It＋v.＋to do sth.(动词不定式作主语时除动词be以外，动词take, cost, need, require, make, sound, occur 等也可用it作形式主语，把动词不定式后置) (2)it代替动名词短语作主语 It is no good/no use/fun/a waste of time ＋doing sth. (3)it代替从句作主语 用it 作形式主语的结构主要用于下列句型： ①It is/was＋名词＋从句：这类名词有：a fact, a surprise, an honor, a pity, common knowledge 等； ②It is/was＋形容词＋从句：这类形容词有：natural, true, strange, necessary, important, obvious, certain, wonderful, funny, possible, likely, probable等； ③It＋动词＋从句：这类动词有：seem, happen, appear, look, matter, make, strike, occur (突然想起)等； ④It＋is/was＋分词＋从句：这类分词有：said, reported, believed, known, decided, proved, thought, expected, announced, arranged, amusing, puzzling, striking等。 先学通(通过句子变换把握句式特点) 　(用it作形式主语改写句子) ①I happened to have no money with me. → ②To drive on the icy road is dangerous. → ③She is said to go abroad for further study next month. → It happened that I had no money with me. It is dangerous to drive on the icy road. It is said that she will go abroad for further study next month. 再写美(通过句子仿写做到运用自如) ④他很难独自抚养这个孩子。 the child on his own. ⑤他突然想到他把钥匙忘在办公室了。 he had left his keys in the office.(occur) It was pretty hard for him to bring up It suddenly occurred to him that 2．现在分词短语作状语 (1)现在分词(短语)作状语可以表示时间、原因、结果、方式或伴随情况等，相当于一个状语从句。 (2)现在分词(短语)作状语，含有一般式(doing)、完成式(having done)以及完成被动式(having been done)。 (3)一般情况下，分词作状语时，其逻辑主语就是句子的主语；如果作状语的分词的逻辑主语和句子主语不一致，分词就要带上自己的逻辑主语，构成独立主格结构。 注意： (1)现在分词作状语时，如果表示否定，not要放在现在分词前面。 (2)用现在分词还是过去分词作状语的关键，首先是要分清非谓语动词与逻辑主语之间的关系是主动还是被动，其次是分清其动作和谓语动词动作的先后关系。 先学通(通过句子变换把握句式特点) ①(2021·新高考Ⅰ卷)When the father saw their downcast eyes, he told them to clean up the kitchen. → ，the father told them to clean up the kitch