北师大版（2019）必修第二册Unit 4 Information techn Lesson 3 Internet and Friendship Language Points 课件-(18张PPT)

(共18张PPT)
Unit 4 Information and Technology
Lesson 3 Internet and Friendship
1. harm v.伤害　n.损害;伤害
教材原句 Do you think the Internet helps or harms friendships
Staying up constantly can do harm to/be harmful to your health.
do harm to=be harmful to 对...有害
harmless adj.无害的
Exercises:
(1) It has been confirmed that too much workout is _________(harm) to our health.
(2) Experts say that eating too much junk food does harm ____ our body.
harmful
to
2. argument n. 论点；论据
教材原句 Identify one sentence for each argument that states this general idea.
eg: They had a heated argument concerning the importance of money.
The public argued for the policy that the tax should be reduced.
Tom argued with his parents about/over buying a new car.
heated argument 激烈的争论
argue for/against sth. 支持；赞同/反对
argue with sb. about/over sth. 就...和...争论
Exercises:
(1) We are always arguing with each other ___________ money.
(2) Most students argue _____ the view that the final exam should be cancelled.
(3) We had an _________(argue) with the waiter about the bill.
about/over
for
argument
3. replace vt. 取代；接替
教材原句 Firstly,talking online is no replacement for face-to-face contact — images really cannot replace a real-life smile or hug.
eg: They replaced their old equipment with the fancy one.
replace A with/by B 用B代替A
replacement n. 替代；替代品
代替：take the place of=take one’s place
in one’s place=in place of
Exercises:
(1) Personally, I think store shopping will exsit along with online shopping but will never ________(replace)
(2) The teacher replaced the outdated teaching method _______ activity-based method.
(3) Paul just is a ___________(replace) but he sticks to training.
be replaced
with/by
replacement
4. concentrate vi. 专注；集中注意力
教材原句 According to a parenting expert,Denise Daniels, communicating through a screen makes it more difficult for children to concentrate or show kindness to others.
eg: When you concentrate on one task you can get it done faster and better.
Driving requires total concentration.
concentrate on... 全神贯注于...
concentration n. 集中；专心
全神贯注于：focus on=focus one’s attention on=concentrate one’s attention on=be lost in=be absorbed in
Exercises:
(1) You can make it with the attention ________(concentrate) on the task.
(2) I need a lot of ____________(concentrate) to complete the task.
(3) Tom concentrated all his attention on __________(rescue) the disabled.
concentrated
concentration
rescuing
5. concerned adj. 关心的；关切的
教材原句 Some people are only concerned with their online popularity.
eg: (1) Her job is something concerned with computers.
(2) As tourism develops, people are becoming increasingly concerned about the environment.
(3) As far as I am concerned, riding bikes is one of the solutions to air pollution.
(4) I am writing to inform you of some suggestions concerning traditional customs.
be concerned with sth. 关注...;与...有关
担心；担忧
as far as sb be concerned 在某人看来
concerning prep.关于
rescuing
Exercises:
(1) My mom is really _________(concern) with the health of everyone in our families.
(2) What ____________(concern) me now is our lack of preparation for the change.
(3) He asked several questions _____________(concern) the future of the company.
concerned
concerns
concerning
6. rewarding adj. 有益的；有意义的；值得的
教材原句 ...though we know that the number of “likes” or followers cannot compare to having long-term and rewarding friendships.
eg: (1) Zhang Tian thought the things he did were rewarding.
(2) Difficult as the job is, the finanical rewards are great.
(3) The police will reward whoever provides useful information.
n. 报答；报酬；奖赏；悬赏金
vt. 报答；奖赏；酬谢
in reward for...=as a reward for... 作为对...的回报
Exercises:
(1) What he did is very _________________(reward).
(2) The old lady gave Tom some candies ____ a reward for his good behavior.
(3) Our efforts _______________(reward) in the future.
rewarding
as
will be rewarded
7. content n.内容
教材原句 In addition, a lot of content posted on social media is shallow or trivial.
eg: food with a high fat content
It is advisable to look at the contents page of a book before buying it.
I am content with the second place, because I know I tried my best.
n. 含量
be content with=be pleased/satisfied with 对...满意
n. 目录（用复数）
8. basis n. 基础；基点
教材原句 Friendships are built on the basis of trust.
eg:The book is based on a true story.
the basic principles of physics.
The two approaches are bascially similar.
on the basis of 在...基础上
be based on... 以...为根据
basic adj. 基本的；基础的
basically adv. 基本上
Exercises:
(1) _____ the basis of those facts, we can reach the following conclusions .
(2) _________(basic), there is not a lot we can do about it.
(3) Our marriage is _______(base) on love rather than money.
On
Basically
based
9. percent n. 百分比；百分数
教材原句 And with online communication you can never be 100 percent sure that the people you are chatting to are being honest about who they are.
eg:What percentage of the students is near-sighted
percentage n. 百分率；百分比
+age 变名词的词：
1. short-shortage 2. leak-leakage
3. pack-package 4. post-postage
10. limiting adj.局限的；限制性的
教材原句 Traditional ways of communicating can be limiting and take time.
eg: a time limit
in the city limits
He tried my patience to its limits
A lack of formal education will limit your job opportunities.
limited adj.有限的 limitless adj. 无限的
n. 限制；限度
n. 界限；边界
n. 极限
vt. 限制 limit... to... 将...限制在...内