Transcript U4 T1 SD

Unit 4 Amazing Science
Topic 1 When was it invented ?
Section D
Learning aims
1.能正确拼读新单词：explorer、 mark
system 、man-made
2.掌握重点词组：guiding marks 、the rest
of the time等
3.复习一般过去时的被动语态。
4.了解古代和现代人确定方位的方法，明白
学习科学文化知识的重要性。
《同步练习册》第一题
Read and understand
Read the passage and discuss
the questions on Page88.
• 1. How did the early explorers know where they were?
• They found out where they were by using stars.
• 2. What’s the disadvantage of using the stars as
guiding marks?
• Its disadvantage is that it didn’t work well when the
weather was bad and the stars could not be seen.
• 3. What is a GPS? Is it useful to use?
• It is like a man-made star. We can use it at any time,
in any place and in any weather to find out our
position. It is very useful.
• 4. What do you think the GPS will be used for in the
future?
• …
Listen and read
Translate happily
1.导向标2.奏效、起作用3.剩余时间
4.人造星星5.在任何时间、任何地点、任何天气
1.guiding book2.work well3.the rest of the time
4.a man-made star 5.at any time、 in any place
in any weather
Learn in groups
1.The early explorers found that the stars in
the sky were good guiding marks.
2……and in which direction they were going.
3.But it didn’t work so well.
Language points
作记号、作标记
1.mark 作动词意为________________
标记、记号、分数
作名词意为_______________
朝……方向
2.in…direction 意为 _________
in the opposite direction
Eg: 相反的方向________________
in the same direction
同一方向______________
造句：那辆摩托车撞上了一辆迎面开来的卡车。
That motor bike hit a truck coming in the opposite direction
________________________________________
奏效，起作用，产生影响
3. work well _________________
相关短语：
算出、演算出 work at 意为
work out 意为___________
从事于、致力于…
___________
Class feedback
根据首字母提示，完成短文。
Thanks to GPS, we can exactly know w
here
_____we
are now. GPS is like a man-made
sed in any place and any
“star”. It can be u____
osition
weather condition to find out our p________.
In the past, the early explorers had to use
stars in the s____
ky to tell them where they
were, however, this method didn’t work well
when the weather was bad. So GPS is a great
invention that can help humans to better
e________
our planets.
xplore
Can you remember them
in one minute?
Functions
I wish I could go into space some day.
I hope your dream will come true.
It’s said that he invented more than two
thousand things during his life.
Inventing is interesting and exciting and
everyone can be an inventor.
Grammar
Passive Voice (Ⅱ)
The radio was invented by Guglielmo Marconi
in 1895.
一般过去时的被动语态构成：
When was the digital
camera developed ?
were/was +
It was developed in
the 1970s.
v.的过去分词
Where was it
developed?
It was developed in
Japan.
What is a rocket
used for?
It is used for sending
satellites or spaceships
into space.
were sold
1.You are late, all the tickets __________(sell)
out
an hour ago.
2.This type of cellphone ____________(make
)in
were made
Shenzhen.
3. I _________________
wasn’t invited ( not invite) to yesterday’s
party.
checked
4. ________
Were those machines __________(check)
this morning?
were planted
5. Many trees and flowers ______________(plant)
in our school last year, and they made our school a
beautiful garden.
Grammar exercise
Passive voice
was /were +done
( C ) 1. A big supermarket _____in our city last year.
A. is built
B. were built C. was built
( C ) 2.Could you tell me who the radio ____ by?
A. invents
B. invented
C. was invented
( B ) 3. Many trees and flowers _____ in our school last year.
They made our school more beautiful.
A. have planted B. were planted C. planted
( C ) 4.The children ____ swim last month and they can swim
very well now.
A. are taught
B. were taught C. were taught to
( A ) 5.It is said that potato chips _____by mistake about one
hundred years ago.
A. were invented
B. invented
C. are invented
Choose the best answer.
( C) 1.Hurry up, you ____ on the phone.
A. Wanted
B. was wanted C. are wanted
( C) 2. Some stories _____the children by the teacher
everyday.
A. is told for
B. are told for
C. are told to
( A) 3._____that he has studied abroad for five years.
A. It is said
B. It says
C. That is said
( B) 4.The window ____ five minutes ago.
A. is cleaned
B. was cleaned
C. can be cleaned
( C) 5.The children ______by the teachers at school.
A. take care of
B. are taken care
C. are taken care of
( A ) 6. I have no idea what ______while I was asleep.
A. happened
B. was happened C. happens
( B ) 7. In some countries, tea _____before meals.
A. is serving
B. is served
C. served
( A ) 8. This kind of books ______well.
A. doesn’t sell B. isn’t selling C. aren’t sold.
( B ) 9. I ______ten minutes to decide which sentence was
right by the teacher.
A. gave
B. was given
C. was giving
( B ) 10. Teachers ______in every part of the world.
A. are needing
B. are needed
C. will need
Homework
完成<同步练习册》
其余习题
We Learn: 1. Some words : mark, explorer
We can:
2. Some phrases: find out, in …, direction,
as long as, work well, the rest of the time,
be used to, the shape of
3. Some sentences:
This method worked well at night as long
as the weather was good and the stars could be seen.
1. Use the passive voice of the simple past tense more
properly.
2.Talk about new technology GPS.
3. Develope our imagination and creativity by
designing our own inventions.
Thank you