Unit5 Water Part1 Reading课件2022-2023学年沪教牛津版英语七年级下册

Unit 5 Water part 1-Reading 2 目录 1.Reading 2.notes 3.practice 1.Reading I am one of the natural elements. I have no colour, I have no smell, I have no taste, I have no shape, I am very valuable , Flowers and trees need me, You need to drink me every day. Right! I’m water! Who am I ? A What do you know about …? How much do you know about water? Try this short quiz below. Circle the correct answer. 1. You can live without water for a few . a. hours b. days c. weeks 2. When you exercise, you need ____ water. a. more b. less c. no 3. Water covers about ____ of the Earth. a. one third b. one half c. two thirds 4. About ____ of the water on Earth is “fresh” or without salt. a. 3% b. 10% c. 20% B1 Look at the picture below and put the following sentences in the correct order. Write the numbers 1-5 in the boxes. It runs into rivers. It rises from the sea to the sky. It runs into the sea. It falls as rain again. Water falls from the clouds as rain. 2 4 3 5 1 2.notes notes： 1.When you exercise,you need more water. exercise ①（不及物动词〕锻炼 You should exercise more. ②（及物动词〕锻炼（身体某部位） Swimming exercises the whole body. ③[可数名词〕习题;练习;一套动作 We do morning exercises every day. ④(不可数名词〕锻炼，运动 I really need to take more exercise because I'm putting on weight. 2.two thirds 三分之二 英语中分数的表达方式是：分子用基数词，分母用序数词，分子大于一时，分母要加S。 Two thirds of the workers in their factory are young people. 拓展 当“分数十of+(限定词＋)名词/代词”用作主语时，谓语动词的单复数取快于of后的名词或代词的单复数。如果是可数名词复数或复数代词，谓语动词用复数形式；如果是不可数名词、可数名词单数或单数代词，谓语动词则用单数形式。 Three eighths of the students are digging holes. Two fifths of the water is dirty. 注意 以下分数有两种表达方式： 1/4: one fourth; a quarter 3/4: three fourths; three quarters 3.About 3% of the water on Earth is fresh or without salt. (1) on Earth 在地球上 与onthe Earth 同义。 We live on Earth. = We live on the Earth. 拓展: on earth 究竟;到底 置于what, when 等疑问词之后，加强语气。 What on carth is that? (2)fresh〔形容词〕 ①水 淡的;无盐的 Poyang Lake is the largest fresh