资源简介

(共18张PPT)
UNIT 4 The Wonders of Nature
Section B 2a-2c
Learning objectives
1. 能梳理单元反义词并利用对照记忆策略背诵单词，并结合自然奇观等主题，按语义类别梳理话题词汇。
2. 通过造句、短文填空等练习，内化 located、survive、deep 等词汇的用法，能正确使用 how long/high/deep 等结构提问，并能在语篇中运用目标词汇完成填空。
3. 掌握“How + adj. / adv.”结构并用于询问数量、频率等，并通过语篇练习词汇，借助大数字和形容词比较级了解贝加尔湖。
Preview new words and phrases
risky adj. 有危险(或风险)的
southern adj. 南部的; 向南的
located adj. 位于; 坐落在的
freshwater adj. 淡水的; 淡水中生长的
type n. 类型; 种类
attract v. 吸引; 招引; 引起(反应)
curious adj. 好奇的; 求知欲强的
traveller (= traveler) n. 旅行者; 游客
natural adj. 自然的; 天然的; 天生的
Siberia 西伯利亚
Russia 俄罗斯
Lake Baikal 贝尔加湖
Belgium 比利时
①勾画生字词，查单词表或字典做标记
② 完成以下词汇反义词匹配
单词 释义
locate a similar group of things or people
freshwater water that is not salty
type be in a place
attract from nature, not made by people
curious make someone interested in something
traveller wanting to know something more
natural someone who travels from place to place
Task1 自主预习P36-37,完成以下任务
Exploration
Engagement
How to describe a famous place.
deep
dark
dangerous
large
hot
high
cold
snowy
long
beautiful
Most of the adjectives have opposite words, do you know
Exploration
Most of the adjectives have opposite words, do you know
I. 描述高低、上下、深浅
1. high 高的 – low 低的
2. deep 深的 – shallow 浅的
3. above 在…上面 – below 在…下面
4. top 顶部 – bottom 底部
5 . up 向上 – down 向下
6. long 长的 – short 短的
7. wide 宽的 – narrow 窄的
II. 描述方位、方向
1. northern 北方的 – southern 南方的
2. eastern 东方的 – western 西方的
3. left 左边的 – right 右边的
4. front 前面的 – back 后面的
III.描述生死、存亡、安危
1. alive 活着的 – dead 死的
2. live 活的 – dead 死的
3. safe 安全的 – dangerous/risky 危险的
4. save 拯救 – kill 杀死
5. survive 存活 – die 死亡
IV. 描述好坏、优劣
1. good 好的 – bad 坏的
2. well 健康/好地 – badly 糟糕地
3. great 极好的 – terrible 糟糕的
4. nice 美好的 – awful 极坏的
5. beautiful 美丽的 – ugly 丑陋的
6. famous 著名的 – unknown 无名的
7. useful 有用的 – useless 无用的
8. helpful 有帮助的 – helpless 无助的
Match the words on the left with their opposites on the right.
2a
1.____ below　　　5. ____ top
2.____ common　　6. ____ northern
3.____ low　　　　7. ____ risky
4.____ dead　　　 8. ____ survive
A. safe　　　 E. unusual
B. bottom　　 F. living
C. southern　 G. high
D. above　　 H. die
在...下面
常见的
低的
死的
顶部
北部的
存活
在...上面
安全的
底部
不寻常的
活着的
高的
死去
D
E
G
F
B
C
A
H
adj.有危险的;冒险的
adj.南部的
Exploration
Tips:
1.先理解单词含义，然后再匹配
2. 观察词性，也可以快速匹配。
What do you know about Lake Baikal
Exploration
Exploration
Located in Siberia, Russia, Lake Baikal is one of the world's most famous lakes. It is the ______ freshwater lake in the world. To reach the bottom, you must ______ 1,620 metres! It is also larger than most other lakes. Its ______ covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still ______ in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural _______!
Read fast and answer the questions.
Q1: Where is Lake Baikal
Q2: How long is it from the level to the bottom
Q3: How large is it
Q4: How many types of animals live here
deep　survive　wonderful　surface　dive
Complete the passage with the correct forms of the words in the box.
Exploration
Located in Siberia, Russia, Lake Baikal is one of the world's most famous lakes. It is the ______ freshwater lake in the world. To reach the bottom, you must ______ 1,620 metres! It is also larger than most other lakes. Its ______ covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still ______ in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural _______!
deepest
dive
surface
survive
adj.位于
西伯利亚
贝加尔湖
比利时
n.种类
v.吸引
adj.好奇的
n.旅行者
adj.自然的
wonder
Language points
1. deep /dip/ (adj. 深的；纵深的) 变形：deeply (adv. 深深地)；depth (n. 深度)
用法：常用于描述物理深度，也可比喻感情、呼吸等。
原文：It is the deepest freshwater lake in the world. (它是世界上最深的淡水湖。)
例句：
1. The river is too deep to swim in. (这条河太深，不能游泳。)
2. She took a deep breath before jumping into the water. (跳水前她深吸了一口气。)
2. dive /daiv/ (v. 跳水；潜水；俯冲 n. 潜水)
变形：diver (n. 潜水员)；diving (n. 跳水/潜水运动)
用法：
1. 作动词：dive into... (潜入……；跳入……)
2. 作名词：make a dive (进行一次潜水)
原文：To reach the bottom, you must dive 1,620 metres! (要到达湖底，你必须潜1620米！)
例句：
1. The bird dived into the water to catch the fish. (鸟儿扎进水里抓鱼。)
2. He likes to dive into the swimming pool. (他喜欢跳进游泳池。)
Language points
3. surface / s f s/ (n. 表面；水面 v. 浮出水面；露面)
用法：
1. 作名词：on the surface (在表面上)
2. 作动词：surface from... (从……浮出水面)
原文：Its surface covers 31,500 square kilometres. (它的表面积覆盖了31500平方公里。)
例句：
1. Ice forms on the surface of the lake in winter. (冬天湖面结了冰。)
2. The submarine finally surfaced after an hour. (一小时后潜艇终于浮出了水面。)
Language points
4.survive /s vaiv/ (v. 幸存；活下来；挺过)
变形：survivor (n. 幸存者)；survival (n. 幸存；生存)
用法：
1. survive sth. (在……中幸存)
2. survive on... (靠……生存/维持生活)
原文：But over 1,200 different types of animals can still survive in this environment. (但是有1200多种动物仍能在这种环境下幸存。)
例句：
1. Few people survived the car crash. (很少有人在这次车祸中幸存。)
2. Many plants cannot survive without water. (许多植物没有水就无法存活。)
Language points
5. located 形容词 / 动词过去分词：位于……的、坐落在……的；
变形：动词 locate（定位、位于），名词形式：location（位置、地点）
含义：
作形容词时，常用搭配：be located + 介词短语（如 in, at, on, near），表示“某物的位置”。
例句
1. The famous waterfall is located in the deep part of the national park.（这座著名的瀑布位于国家公园深处。）
2. The small town is located at the foot of a mountain and next to a lake.（这个小镇坐落在山脚下、湖边。）
3. We are trying to locate the hidden cave mentioned in the local legend.（我们正试图找到当地传说中提到的隐藏洞穴。）
Language points
I. 选词填空
1. The Pacific Ocean is the ___________ ocean in the world.
2. Many animals ____________in the extreme cold weather finally.
3. Please don't jump or _____________ into the shallow pool. It's dangerous.
4. I ___________ (wonder) who won the game at last.
5. The oil spilled on the ______________ of the sea.
II. 翻译句子
1. 贝加尔湖是世界上最深的湖泊。(deepest)
2. 这种植物在这种炎热的天气里能存活吗？(survive)
Evaluation
Lake Baikal is the deepest freshwater lake in the world.
Can this kind of plant survive in such hot weather
deepest
survived
dive
wonder
/wondered
surface
dive, wonder, deep, surface, survive
Evaluation
II. 用括号中所给单词的适当形式填空
1. The _________(north) part of the mountain is covered with thick forests all year round.
2. The _________ (curious) of the scientists led them to discover a rare waterfall hidden in the valley.
3. __________ (beauty) lakes and mountains make this area a popular tourist attraction.
4. As ________(visit), we should protect the environment of the natural reserve.
5. The hotel ______ (locate) in the heart of the ancient town offers a beautiful view of the river.
northern
Beautiful
curiosity
visitors
located
Evaluation
II. 用括号中所给单词的适当形式填空
6. It’s __________ (danger) to climb the steep cliffs without professional equipment.
7. The _________ (west) side of the canyon has more amazing rock formations.
8. We learned about the ________ (culture) traditions of the local people in the village.
9. The peaceful river runs through the valley and _______(attract) many artists.
10. Many _________ (explore) come to this rainforest to study rare plants.
dangerous
western
cultural
explorers
attracts

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