资源简介

(共51张PPT)
北京版 四年级下册
Unit Two Keep Safe
Lesson 6
It's Dangerous to Skate on Thin Ice
在本课时主题图的帮助下，学生能够听、说、读词汇和句型；能在真实的语境中运用这些单词和句型描述日常请求与回应、安全提醒的句型。
学习理解
在看、听、读、说活动中学习、理解对话内容，培养学生用英语思维的能力和初步运用英语交际的能力，使学生能够在生活情景中运用所学句型，达到描述日常请求与回应、安全提醒的目的。
应用实践
通过多种活动提升学生听说技能。通过描述日常请求与回应、安全提醒的话题的牵引下的情景设置和角色表演和小组练习，巩固本节课情态动词和祈使句的核心语言，学生能进一步去判断并思考表达观点，发展了口语技能。
迁移创新
【核心词汇】
skate, fall, March, thin, dangerous, board, lake
【核心句型】
1. Can I skate here this afternoon I'm afraid not. It's not safe.
2. You may fall into the water.
3. It's March. It's getting warm. The ice is too thin.
4. It's dangerous to skate on thin ice.
5. There is a board here. It says "No skating".
核心知识点
Learning Objectives
目录 contents
Lead - in
Presentation
Practice
Summary
Homework
Part 01
Lead - in
Part 02
Presentation
Vocabulary
skate /ske t/ v. 滑冰
【过去式】skated 【现在分词】skating
【搭配】 go skating 去滑冰 / 溜滑板 ；
skate on the lake 在湖上滑冰
【例句】We love to skate on the frozen lake in winter.
冬天我们喜欢在结冰的湖面上滑冰。
Vocabulary
【过去式】 fell 【现在分词】 falling
【搭配】 fall down 摔倒；跌倒
fall off 从…… 摔下来
【例句】Be careful not to fall on the ice when you skate.
滑冰时小心别在冰上摔倒。
fall /f l/ 摔倒，掉进
Vocabulary
【搭配】in March 在三月
early March 三月初
【例句】 Spring comes in March in most parts of China.
中国大部分地区三月迎来春天。
March /mɑ t / n. 三月
Vocabulary
thin /θ n/ adj. 瘦的；薄的
【变形】比较级 thinner；最高级 thinnest
【反义词】 fat 胖的 thick 厚的
【例句】My little sister is tall and thin.（我的小妹妹又高又瘦。）
Don’t skate on the thin ice—it’s too dangerous.
（别在薄冰上滑冰，太危险了。）
Vocabulary
【拓展】 danger（危险，可数 / 不可数）； dangerously（危险地）
【反义词】safe 安全的
【搭配】a dangerous place 危险的地方
It’s dangerous to do sth 做某事是危险的
【例句】 It’s dangerous to swim in this deep lake alone.
独自在这片深湖里游泳很危险。）
dangerous / de nd r s/ adj. 危险的
Vocabulary
board /b d/ n.告示牌
【拓展】过去式 boarded；现在分词 boarding
【搭配】 a skate board 滑板； on board 在船上 / 飞机上
【例句】He likes to ride his board in the park every weekend.
他喜欢每周末在公园玩滑板。
Vocabulary
【复数】lakes
【搭配】 by the lake 在湖边 ； swim in the lake 在湖里游泳
【例句】There is a beautiful lake in the middle of the park.
公园中央有一片美丽的湖。
lake /le k/ n. 湖，湖泊
Let’s play a game!
Language points
1. 情态动词can的用法（表请求）
结构：Can I/we + 动词原形 + 其他？ （我 / 我们能…… 吗？）
→ 用于向对方提出委婉的请求
对话原句：Mum, can I skate here this afternoon
回答：肯定→Yes, you can.；否定→I'm afraid not. （委婉否定）
请求许可 - Can I + 动词原形 + 其他？
句意：我能…… 吗？
回答：① 肯定：Yes, you can.
② 否定：I'm afraid not. （委婉）/ No, you can't.
仿写：Can I watch TV after dinner （我晚饭后能看电视吗？）
→ I'm afraid not. You must do your homework.
Language points
2. 情态动词may的用法（表可能性）
结构：主语 + may + 动词原形 + 其他 （某人可能会……）
→ 表 “不确定的可能性”，语气比 can 弱
对话原句：You may fall into the water.（你可能会掉进水里）
Language points
Language points
3. 现在进行时be doing表 “逐渐的状态变化”
结构：主语 + be (am/is/are) + 动词 - ing
特殊用法： “正在做某事”，还可表动作 / 状态慢慢发生，本对
对话原句：It's getting warm.（天气正慢慢变暖）
仿写：It's getting dark.（天慢慢黑了。）
The tree is getting tall.（树慢慢长高了。）
There be句型（表 “某地有某物”）
结构：There is + 单数名词 / 不可数名词 + 地点；
There are + 复数名词 + 地点
对话原句：There is a board here.（这里有一个警示牌）
关键：be 动词的单复数由后面的名词决定（就近原则）
仿写：There is a book on the desk.（桌子上有一本书。）
Language points
It's + 形容词 + to do sth.
含义：做某事是…… 的（it 是形式主语，真正主语是后面的 to do sth.）
对话原句：① It's not safe.（=It's not safe to skate here.）
② It's dangerous to skate on thin ice.
③ It's dangerous to swim in the lake.
关键：to 后必须跟动词原形
Language points
标识类否定祈使句：No + 动名词
结构：No + V-ing. → 用于公共标识，表 “禁止做某事”
对话原句：No skating. / No swimming.
拓展：No parking.（禁止停车）
No smoking.（禁止吸烟）
Language points
宾语从句简化：主语 + say/says + 直接引语
结构：主语 + say (s) + “具体内容”
对话原句：It says "No skating".（牌子上写着 “禁止滑冰”）
→ 物作主语时，say 表 “（标识 / 信件等）写着”
Language points
Lesson 6
It's Dangerous to Skate on Thin Ice
can 引导的一般疑问句
在冰山溜冰
fall into the water
掉进水里
妈妈，今天下午我能在这里滑冰吗？
为什么？
现在是三月。天气变暖了。冰层太薄了。
我明白了。在薄冰上滑冰是很危险的。
恐怕不行，甜甜。这里不安全。你可能会掉进水里。
No swimming!
禁止游泳！
No skating!
禁止溜冰！
在湖里游泳
看，妈妈。这儿有一块牌子。上面写着“禁止滑冰”。
是的。它还写着“禁止游泳”。
我明白了。在湖里游泳是很危险的。
你说得对。
skate here 在这里滑冰 fall into the water 掉进水里
get warm 变暖，变暖和 too thin 太薄
on thin ice 在薄冰上 No skating 禁止滑冰（警示牌标识）
No swimming 禁止游泳（警示牌标识）
swim in the lake 在湖里游泳（对话结尾的安全提醒）
be dangerous to do sth 做某事是危险的
Phrases
Listen, find and say.
待插入音频
skating
the ice
swimming
swim in the lake
skate
Listen, circle and say
待插入音频
请不要……这样做不安全。/这样做很危险。
Can you find other dangerous actions
What do you want to say to the people
Please don't climb the trees. It's not safe.
Can you find other dangerous actions
What do you want to say to the people
Please don't go fishing. It's dangerous to go fishing by the lake.
Can you find other dangerous actions
What do you want to say to the people
Please don't play with the phone when you are walking. It's not safe.
Can you find other dangerous actions
What do you want to say to the people
Please don't play by the river. It's dangerous to play by the lake.
Make and share.
Make safety boards with "Don't/No..." for the park, and tell the reasons.
为公园制作带有“不要/禁止……”字样的警示牌，并说明原因。
skate here 在这里滑冰 fall into the water 掉进水里
get warm 变暖，变暖和 thin ice 薄冰
on thin ice 在薄冰上 swim in the lake 在湖里游泳
No skating 禁止滑冰 No swimming 禁止游泳
Phrases
No swimming. Because the lake is deep and it’s not safe.
Let's talk
（禁止游泳。因为湖水很深，不安全。）
No littering. Because we need to keep the park clean and tidy.
Let's talk
（禁止乱扔垃圾。因为我们要保持公园干净整洁。）
No picking flowers. Because flowers make the park beautiful for everyone.
Let's talk
（禁止摘花。因为花朵让公园变得更美丽，供大家欣赏。）
No stepping on the grass. Because the grass needs our protection to grow well.
Let's talk
（禁止践踏草坪。因为小草需要我们的保护才能健康生长。）
No climbing trees. Because it’s dangerous and you may fall down.
Let's talk
（禁止攀爬树木。因为这很危险，你可能会摔倒受伤。）
Part 03
Practice
短语翻译（汉译英 / 英译汉）
(1) 掉进水里 ____________
(2) 变得暖和 ____________
(3) on thin ice ____________
(4) 在湖里游泳 ____________
(5) 禁止滑冰 ____________
fall into the water
get warm
在薄冰上
swim in the lake
No skating
单项选择
(1) —Can I play football outside — _________ . It's raining.
A. Yes, you can B. I'm afraid not C. No, I can't
(2) It's ________ to cross the street without looking.
A. dangerous B. danger C. safely
(3) The sign says " _______ smoking". A. Not B. No C. Don't
B
A
B
(4) ________ a bird in the tree.
A. There is B. There are C. It is
(5) It ________ warm in spring.
A. get B. getting C. is getting
A
C
句型转换
(1) It's dangerous to swim in the river.（改为一般疑问句）
________ ________ dangerous to swim in the river
(2) I can skate here.（改为否定句）
I ________ ________ here.
Is
it
can’t skate
句型转换
(3) There is a board near the lake.（对划线部分提问）
________ ________ near the lake
(4) The ice is thin.（改为否定句）
The ice ________ ________.
What
is
isn’t thin
选词填空
can, may, it's, too, getting
1. —__________ I drink some juice —Sure, here you are.
2. The box is ___________ heavy. I can't carry it.
3. It's winter now, but the weather is ___________ warm.
4. You ___________ lose your pen if you don't put it in your bag.
5. ___________ dangerous to play on the street.
Can
too
getting
may
It’s
连词成句
ice, the, thin, too, is (.)
skating, no, says, it (.)
warm, it's, getting (.)
do, it's, to, dangerous, that (.)
The ice is too thin.
It says No skating.
It's getting warm.
It's dangerous to do that.
Part 04
Summary
skate, fall, March, thin, dangerous, board, lake
Summary
Words
Sentences
1. Can I skate here this afternoon I'm afraid not. It's not safe.
2. You may fall into the water.
3. It's March. It's getting warm. The ice is too thin.
4. It's dangerous to skate on thin ice.
5. There is a board here. It says "No skating".
Part 05
Homework
基础：模仿课文录音，跟读课文中的对话，熟悉本课关于日常请求与回应、安全提醒句型。另外尝试分角色朗读课文，注意读的语气。
提高：与同学一起模拟分角色朗读课文中的场景，顺便观察公共场所的标识（No parking/No smoking/No running），并记录下来，并解释原因。
拓展：根据核心词汇和句型，自己写一写公共场所的警示语，并询问爸爸妈妈他们了解的警示语。
Homework
北京版 四年级下册
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