外研版（2019）选择性必修第一册 Unit5 Revealing nature高频词汇课件（一）(共26张PPT)

(共26张PPT)
Unit 5
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
Unit5 高频词汇一览
suspect n.&v.
decline n.&v.
导入
详情
练习
精准释义
词块例句
高考链接
词汇拓展
decline
decline n.&v.
语义网络图
词源
导入
decline [d kla n] n.&v.
economic decline population decline
导入
decline
decline
拒绝
看图猜词义
减少；下降
词源
decline 下降，婉言拒绝
de-, 向下，离开。-clin, 弯，转，词源同lean, incline. 即向下转开，引申义婉言拒绝。
decline
下降
基本义
趋势“下降”
“下降”
别人的邀请
数量“下降”
谢绝；拒绝
减少；下降
衰退；衰落
v
n
减少；下降；衰退；衰落
语义网络图
精准释义
n.[C] & [U]减少;下降; 衰退;衰落a continuous decrease in the number, value, quality, etc. of sth
vi. 减少;下降to become smaller, fewer, weaker, etc.
vi. 衰退;衰落
vt.(formal) 谢绝；婉言拒绝to refuse politely to accept or to do sth
词块例句
decline by…减少了……
decline to…减少到……
An increase in cars has resulted in the decline of public transport.汽车的增加导致了公共交通的减少。
The number of tourists to the resort declined by 10% last year.去年到这个胜地旅游的人数减少了10%。
I offered to give them a lift but they declined.我主动邀请他们搭车，但他们婉言谢绝了
记忆技巧：de 向下 + clin 倾斜 + e → 向下倾斜 → 衰退
同义词： 作拒绝时refuse
作减少时decrease, reduce，反义词是increase
词汇拓展
These lights, known as adaptive signals, have led to significant declines in both the trouble and cost of travels between work and home.(高考 浙江卷 2020 阅读)
The number of trees larger than two feet across has declined by 50 percent on more than 46, 000 square miles of California forests, the new study finds.(高考 浙江卷 2019 阅读)
该词在历年高考真题中出现49次
高考链接
一、在空白处填入1个适当的单词或括号内单词的正确形式。
According to scientists, our mental abilities begin to _____________
(下降，回落) from the age of 27 after reaching the highest level at 22.
2012 浙江
2. The super star declined __________________ (interview v).
3. They encourage kids to politely decline __________ (do) things that they believe are wrong.（2014 江苏）
4. Scientists estimate that shark populations in the north-west Atlantic Ocean have declined _________ an average of 50% since the early 1970s.
decline/decrease
练习
to be interviewed
to do
by
5. In the US, the monthly decline __________ vehicle sales accelerated （加快） for the last three months, falling 41% in February from a year earlier.
二、根据所给汉语完成下列句子。
1. I ____________________________（已经婉言谢绝了他们的提议）
to exhibit some of my paintings in this gallery.（2014 上海）
2. Many older people don’t begin to experience
_____________________________（身体的衰弱和智力的下降）
until after age 75.（2015 广东）
练习
in
have declined their offer
physical and mental decline
3. Chimps（黑猩猩）in the wild seek food for themselves. Even
chimp mothers regularly ________________________（拒
绝分享食物）with their children.（2016 江苏）
4. A company whose profits from home markets ________________________（在迅速下降）may seek
opportunities abroad.（2014 山东改）
练习
decline to share food
are declining fast / rapidly
导入
详情
练习
词源
精准释义
词汇拓展
高考链接
词块例句
suspect
suspect n.&v.
suspect [s spekt ] v. & n.
导入
The laws I love, the lawyers I suspect.
—— Charles Churchill
西方人向来不乏对律师的揶揄之词。这句话译作“我热爱法律，但我怀疑律师。”
说到怀疑，我们很容易想到doubt，这里为什么用suspect呢？doubt和suspect有什么区别呢
词源
suspect 怀疑：sus-,在下，向上，-spect,看，词源同 spectate,respect.引申词义怀疑。
精准释义
vt. & vi. 猜想；怀疑 to believe that sth may happen or be true
vt.怀疑（某人有罪）to think that sb is probably guilty of a crime
n. [C] 嫌疑犯；可疑分子
adj. 不可信的；可疑的
suspect sb of (doing) sth
They suspect him of a theft.
The policeman suspected him of killing the girl.
The doctors suspected cancer.
She strongly suspected he was lying to her.
She’s not going to be very happy about this, I suspect.
词块例句
词块例句
question a suspect
a suspect package
记忆技巧：sus 下 + pect〔=spect〕看 → 在下面偷偷看 → 怀疑
词汇拓展
辨析 suspect，doubt
suspect：to believe that sth bad may happen or may be true
认为某事会发生，尚缺少依据。
The policeman suspected her of stealing the wallet.
doubt：to think that sth may not be true or that it is unlikely
不确定某事或者认为某事不可能。
I doubt if it will rain tomorrow.
词汇拓展
He pulls out a special device, points it at the suspect, and switches it on.(高考 天津卷6月 2020 阅读)
She suspected that one of her three daughters — then ten, eight, and six — had picked it up, but the girls said they hadn't.(高考 浙江卷 2017 语法填空)
该词在历年高考真题中出现80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. The police suspect him of carrying out two bomb attacks.
________
2. Police have issued a photograph of the suspect. ________
3. The study was carried out with such a small sample that its results are suspect. ________
怀疑
嫌疑犯
不可靠的
练习
二、用doubt或suspect的适当形式填空。
1. I had __________ whether or not I should attend the meet.
2. A driver __________ of drink driving should provide samples for testing.（2011 福建改）
doubted
suspected