外研版（2019） 选择性必修第二册 Unit2 Improving yourself 高频词汇课件（一）（21张PPT）
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| 名称 | 外研版（2019） 选择性必修第二册 Unit2 Improving yourself 高频词汇课件（一）（21张PPT） |  | |
| 格式 | pptx | ||
| 文件大小 | 4.5MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-03-03 11:03:23 | ||
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(共21张PPT)
Unit 2
高频词汇学习(一)
设计说明
本课件依据新教材和新课标的要求，将中英文中思维差异大、高考出现频率高、词义较多、用法灵活的词汇进行了汇总和精讲。
特点创新趣味性导入、追本溯源记单词、多重维度复现单词、遗忘曲线精准练单词、深度学习记忆单词
模块每个词的呈现同中有异，包含导入、详情和练习三个主要模块。具体分为情境导入、词根溯源、语义网络图、精准释义、常见搭配、词块例句、高考链接、学后练习等方面
Unit2 高频词汇一览
security n.
switch n.&v.
security
导入
详情
练习
词源
精准释义
security n.
高考链接
词块例句
词汇拓展
导入
security [s kj r ti] n.
看图
猜词
安检
security check
保安人员
security guard
词源
词源：se- (without 没有) + cur (to care 关心) + -ity (表示状态) → 不需要关心的状态 → 安全
精准释义
n.[U] 安全
n.[U] 安全工作；保安措施
n.[U] 担保；保障；[U] & [C] 抵押品
a sense of security
security checks / cameras
financial security
The group was considered to be a risk to national security. 这伙人被认为是威胁国家安全的危险分子。
Financial security was high on his list of priorities. 在他的心目中，金融安全是十分重要的一环。
You may not enter the security area without authorization. 未经批准不得进入警戒地区。
Let's look at the question of security. 咱们来看一下保安问题。
security
词块例句
词汇拓展
记忆技巧：记忆技巧：se 分开，离开 + cur 跑，引申为“发生” + ity 具备某种性质 → 安全；证券
cure→ secure→ security
The hostels in Rome offer a bed in a dorm room for around $25 a night, and for that, you'll often get to stay in a central location (位置) with security and comfort.(高考 全国新高考I卷 2021 阅读)
Of those Australians who still have a landline, a third concede that it's not really necessary and they're keeping it as a security blanket — 19 percent say they never use it while a further 13 percent keep it in case of emergencies.(高考 全国乙卷 2021 阅读)
该词在历年高考真题中出现37次
高考链接
一、写出下列句子中画线部分的汉语释义。
1. She has bought a bicycle and is worried about security. _________
2. It’s standard practice for a company like this one to employ a security
guard. _________
3. This insurance plan offers your family financial security in the event of
your death. _________
4. If it’s a choice between higher pay and job security, I’d prefer to keep my job. __________
练习
安全
保安
经济保障
工作保障 / 工作稳定
导入
详情
练习
词源
语义网络图
精准释义
高考链接
词块例句
switch
switch n.&v.
词源
语义网络图
导入
switch [sw t ] n.&v.
开灯、关灯你会表达吗？
开灯 __________________ the light
关灯 __________________ the light
turn on / switch on
turn off / switch off
开、关电视如何表达？
开电视 __________________ the TV
关电视 __________________ the TV
turn on / switch on
turn off / switch off
词汇科普：早期的电器的开关钮其实是旋转开关 ,多用turn,而现在旋转的已经不多，多用平面开关，多用switch.
词源
查词源
switch作名词时，其词源义“细软的马鞭”现已消失不用了。
基本义：改变某事物的方向、接通或截断连接的装置，即开关
switch作动词时，最早出现的意思“用马鞭击打”，源自于名词，这一意思现已消失不用了。
作动词时基本义：扳动开关
基本义
语义网络图
switch
n.开关(基本义)
由开到关，由关到开，
状态瞬间发生彻底改变
v.扳动开关”
由具象到抽象
骤变;突变
词
性
转
化
改变;转变
交换;调换
由开到关，由关到开，
两种状态的变化
由一物到另一物
开与关两种状态的交换
精准释义
n. [C]开关；电闸
n. 骤变；突变
vt. & vi. 改变；转变 to change from one thing to another
vt. & vi. 交换；调换 to exchange one thing for another
强调“变”，重change，常和from，to 搭配
强调“换”，重在exchange，常和with搭配
语义
由具体到抽象
语用：名词动化
switch off 关上 (电灯、电视等)近 turn off ；[非正式用语]
不听；不理睬
switch on 打开 (电灯、电视等)近 turn on
switch over 改变；转换
Please switch off the TV when you go to bed. 睡觉时请关上电视。北师大① – 1
I hear that song whenever I switch on the radio. 每次打开收音机时我们都能听到那首歌。外研④ – 3
词块例句
switch
turn on / off the light switch 打开 /关掉灯的开关
He switched the conversation from one subject to another. 他转变了话题。
We’d take the train into the city center, then switch to the tram. 我们乘火车到市中心，接着改乘电车。 2012 湖北改
We asked them if they would switch places with us.我们问他们是否愿意和我们调换一下位置。
We’ve switched over to telephone banking. 我们已经改用电话银行服务了。
词块例句
In Bellevue, the switch to adaptive signals has been a lesson in the value of welcoming new approaches.(高考 浙江卷 2020 阅读)
Or maybe you end up switching your attention away from novels, and discover the history of romantic poets in England.(高考 天津卷3月 2020 阅读)
该词在历年高考真题中出现38次
高考链接
练习
一、写出下列句子中画线部分的汉语释义。
1. She could switch easily from French to English. ______
2. According to the air traffic rules, you should switch off your
mobile phone before boarding. ______
3. The switch in the bathroom is broken and we need a new one for
the light. ______
4. This kind of boat comes with electric pump. And all you have to
do is just switch it on. _______
转换
关掉
开关
打开它
练习
5. Tom said he would switch with me on Saturday. ______
6. Can I switch over to the movie channel _______
调换
转换
Unit 2
高频词汇学习(一)
设计说明
本课件依据新教材和新课标的要求，将中英文中思维差异大、高考出现频率高、词义较多、用法灵活的词汇进行了汇总和精讲。
特点创新趣味性导入、追本溯源记单词、多重维度复现单词、遗忘曲线精准练单词、深度学习记忆单词
模块每个词的呈现同中有异，包含导入、详情和练习三个主要模块。具体分为情境导入、词根溯源、语义网络图、精准释义、常见搭配、词块例句、高考链接、学后练习等方面
Unit2 高频词汇一览
security n.
switch n.&v.
security
导入
详情
练习
词源
精准释义
security n.
高考链接
词块例句
词汇拓展
导入
security [s kj r ti] n.
看图
猜词
安检
security check
保安人员
security guard
词源
词源：se- (without 没有) + cur (to care 关心) + -ity (表示状态) → 不需要关心的状态 → 安全
精准释义
n.[U] 安全
n.[U] 安全工作；保安措施
n.[U] 担保；保障；[U] & [C] 抵押品
a sense of security
security checks / cameras
financial security
The group was considered to be a risk to national security. 这伙人被认为是威胁国家安全的危险分子。
Financial security was high on his list of priorities. 在他的心目中，金融安全是十分重要的一环。
You may not enter the security area without authorization. 未经批准不得进入警戒地区。
Let's look at the question of security. 咱们来看一下保安问题。
security
词块例句
词汇拓展
记忆技巧：记忆技巧：se 分开，离开 + cur 跑，引申为“发生” + ity 具备某种性质 → 安全；证券
cure→ secure→ security
The hostels in Rome offer a bed in a dorm room for around $25 a night, and for that, you'll often get to stay in a central location (位置) with security and comfort.(高考 全国新高考I卷 2021 阅读)
Of those Australians who still have a landline, a third concede that it's not really necessary and they're keeping it as a security blanket — 19 percent say they never use it while a further 13 percent keep it in case of emergencies.(高考 全国乙卷 2021 阅读)
该词在历年高考真题中出现37次
高考链接
一、写出下列句子中画线部分的汉语释义。
1. She has bought a bicycle and is worried about security. _________
2. It’s standard practice for a company like this one to employ a security
guard. _________
3. This insurance plan offers your family financial security in the event of
your death. _________
4. If it’s a choice between higher pay and job security, I’d prefer to keep my job. __________
练习
安全
保安
经济保障
工作保障 / 工作稳定
导入
详情
练习
词源
语义网络图
精准释义
高考链接
词块例句
switch
switch n.&v.
词源
语义网络图
导入
switch [sw t ] n.&v.
开灯、关灯你会表达吗？
开灯 __________________ the light
关灯 __________________ the light
turn on / switch on
turn off / switch off
开、关电视如何表达？
开电视 __________________ the TV
关电视 __________________ the TV
turn on / switch on
turn off / switch off
词汇科普：早期的电器的开关钮其实是旋转开关 ,多用turn,而现在旋转的已经不多，多用平面开关，多用switch.
词源
查词源
switch作名词时，其词源义“细软的马鞭”现已消失不用了。
基本义：改变某事物的方向、接通或截断连接的装置，即开关
switch作动词时，最早出现的意思“用马鞭击打”，源自于名词，这一意思现已消失不用了。
作动词时基本义：扳动开关
基本义
语义网络图
switch
n.开关(基本义)
由开到关，由关到开，
状态瞬间发生彻底改变
v.扳动开关”
由具象到抽象
骤变;突变
词
性
转
化
改变;转变
交换;调换
由开到关，由关到开，
两种状态的变化
由一物到另一物
开与关两种状态的交换
精准释义
n. [C]开关；电闸
n. 骤变；突变
vt. & vi. 改变；转变 to change from one thing to another
vt. & vi. 交换；调换 to exchange one thing for another
强调“变”，重change，常和from，to 搭配
强调“换”，重在exchange，常和with搭配
语义
由具体到抽象
语用：名词动化
switch off 关上 (电灯、电视等)近 turn off ；[非正式用语]
不听；不理睬
switch on 打开 (电灯、电视等)近 turn on
switch over 改变；转换
Please switch off the TV when you go to bed. 睡觉时请关上电视。北师大① – 1
I hear that song whenever I switch on the radio. 每次打开收音机时我们都能听到那首歌。外研④ – 3
词块例句
switch
turn on / off the light switch 打开 /关掉灯的开关
He switched the conversation from one subject to another. 他转变了话题。
We’d take the train into the city center, then switch to the tram. 我们乘火车到市中心，接着改乘电车。 2012 湖北改
We asked them if they would switch places with us.我们问他们是否愿意和我们调换一下位置。
We’ve switched over to telephone banking. 我们已经改用电话银行服务了。
词块例句
In Bellevue, the switch to adaptive signals has been a lesson in the value of welcoming new approaches.(高考 浙江卷 2020 阅读)
Or maybe you end up switching your attention away from novels, and discover the history of romantic poets in England.(高考 天津卷3月 2020 阅读)
该词在历年高考真题中出现38次
高考链接
练习
一、写出下列句子中画线部分的汉语释义。
1. She could switch easily from French to English. ______
2. According to the air traffic rules, you should switch off your
mobile phone before boarding. ______
3. The switch in the bathroom is broken and we need a new one for
the light. ______
4. This kind of boat comes with electric pump. And all you have to
do is just switch it on. _______
转换
关掉
开关
打开它
练习
5. Tom said he would switch with me on Saturday. ______
6. Can I switch over to the movie channel _______
调换
转换