九上U4T2SC.ppt

Unit 4 Amazing Science
Topic 2
When was it invented?
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Look and understand
Robots —Our Servants in the Future?
Hello! We are your friends. We can help you do dangerous and difficult work.
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you think that robots will be part of our
lives in the future?
are meant to be our servants, aren’t
they? be meant to do sth. 应该做某事
you think robots can think or act for
themselves?
does the title have a question mark?
Read the passage and discuss the
questions with your partner.
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Have you ever seen a robot? Would you like to describe it for us?
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Find and circle the words in 1a according to the following
meanings, then write them down.
1. to tell somebody that something bad or dangerous may happen so that they can prevent it ( )
2. to make something happen or appear（　　　）
3. a person who is paid to do house work for a family
（　　　）
4. sure and confident, without any doubts（　　　）
5. to behave in a special way towards somebody or something ( )
warn
cause
servant
certain
treat
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1. No one knows for 。
no one 与none
探究学****br/>a. no one 用来指人，其后不能接of 短语，用做主语时，谓语动词用单数。
No one likes a person with bad manners.
b. none 既能指人又能指物，其后可以接of 短语，当of后是可数名词复数时，谓语动词用单、复数均可。
None of the students is /are in the classroom.
c. 特别注意：
① —— How many people are there in that room? —— None.
② —— Who is in that room now? —— No one.
—— How much will the car cost？ —— I can’t say for certain.
for certain 确切地
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2. all the time =always 一直，总是
3. be surprised at /by…对…… 感到惊讶
be surprised to do sth.
robots can think for themselves, problems may appear.
once 在这用作连词，意为“一旦……就……”,引导时间状语从句。