Unit 5 知识清单 2022-2023学年沪教牛津版（广州沈阳通用）七年级英语下册

Unit5 知识清单 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on the 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 earth is that? (2)fresh〔形容词〕 ①水 淡的;无盐的 Poyang Lake is the largest fresh water lake in China. ② 新鲜的;清新的 Open the window and let some fresh air in. (3) salt 〔不可数名词〕盐 其形容词是salty（咸的） Salt is salty. 4. It rises from the sea to the sky. (1)rise 〔不及物动词〕上升;上涨指从较低位置向上移动 The sun rises in the east. The river rose after the rain. (2)辨析: rise 与raise rise不及物动词（主语自身）上升；升高；起立 He rose and left the room. raise（人为）提高 They raise the flag every morning. 5. It falls as rain again. fall ①〔不及物动词〕下落;降落;跌倒 常见短语有： fall off ( = fall down from)从....上跌落下来 fall over 摔倒 He fell off the bike. ( = He fell down from the bike.） I fell over and cut my knee. ②[名词〕秋季与autumn同义。 The leaves tall in fall. 6. The tap was on. On ①〔副词〕开着 表示已连接、处于工作状态或使用中，其反义词为 off。 The lights were all on. The TV is always on in their house. ②〔介词〕指方位时，意为“在......上面”；指时间时，意为“在.....”，后接具体某一天或某一天的早上/上午、下午、晚上。 The book is on his desk. What happened on his birthday? Let's meet on Sunday afternoon. 7. “Turn that tap off”, said an angry voice. turn off 关掉（水源、煤气、电灯等） 其反义词是turn on，意为“打开（水源、煤气、电灯等） Please turn off/on the radio. 拓展 ①与 tum 相关的其他常用短浯：