Unit2 Sailing the Oceans reading 课件（27张）

课件27张PPT。高 三
Sailing The Oceans
Zheng He
(1405 ---1433),with his treasure fleets , sailed westwards on voyages of trade and exploration. Words and expressions

accomplished 完成的,有技巧的
return to 回到；恢复到
may well 很可能；充分理由
work out 计算，弄明白，锻炼
at the mercy of 受…支配,任 …摆布
accelerate the speed? 加快速度

?


Skim
What ‘s the main idea of the text ?
How many parts is the text divided into?
It tells us how the sailors navigated well without modern instruments.It can be divided into 3 parts.
Part1 ( para.1)
Part2 (page1)
part3 (para.3)raise a problemsolve the problemmake a summaryPart1 (para 1)
What ‘s the fun_ction of the first paragraph?
A. as a summary
B. introduce the topic
D. compare and contrast
C. connecting link
BCareful reading finish the blanks
1.We (很可能) wonder how seamen
explored the oceans before latitude and
longitude made it possible to plot the
position of the ship.
2.The voyages of travelers before the 17th
century show that they were not
(任…摆布) the sea even
though they did not have modern
navigational aids.
at the mercy ofmay wellThey were not “at the mercy of” the sea ,we can use to replace the phrase.
with the help of
under the control of
by means of D. in need of BPart 2 (page1)
The second paragraph is mainly developed
by -
A . giving examples B. classifying
C. making definition D. giving figures
（下定义）
AUsing nature Celestial bodiesweatherseasunseaweedcloudswildlife
coastlineNorth starbirdsfogwindsStructure chart
True or False
At the equator the North star is at its highest.
2. They can use the seaweed to get the direction.
3. In the morning ,nesting birds return to land .
FFTnortheveningFill in the form
They navigated well with the help of the followings.North star
use the height of the sunFog carry ships to destinationreturn to land in the eveningDiscussion
Suppose you were a captain aiming to sail round Africa.
What skills would you seek in your sailors?
2. What problems would you anticipate for this journey?
Part 3 (para. 3)
1.What’s the result of using the skills?
2. Can you guess what the text to write
next ?
The sailors explored the seas and
discovered new landsIt will introduce some instruments.
1
2
4
3
5
6
7
8
9
1
5
9
3
7
4
6
2
8Make up a sentence using the phrase

at the mercy of Home What’s the meaning of
work out ?
Make a sentence using it
Home What’s the difference
between may as well and may well ?
Home Tell the difference
be used to do
be used to doing
used to do
Home “especially “can be replaced by

Home
Congratulations
Home Read the words correctly
encyclopedia
accomplished
navigational

HomeCorrect the sentence
She returned back to school.
Home Translate the sentence into Chinese
Seamen could follow the birds to land even if they were offshore and in the open sea.Home According to the text(语法填空)
Before latitude and longitude made possible to plot a ship's position, the sailors were not at the (merciful)of the sea. Using nature to help seems to (be)the first and most useful form of exploration carried the minimum amount of risk, (especial) keeping alongside the coastline. They used celestial bodies (identify) direction.
(accomplish) navigators were able to use the (high) of the sun ,the color and smell of the seaweed and birds (return) to land in the evening to know their position. They observed the winds their journeys.itmercyhave beenwhich/thatespeciallyto identifyheightreturningbeforeAccomplishedHomework writing task
Write down the story about
“Zheng He” using your own
words .Try to use more adjectives
and clauses to make your writing
as vivid as possible. (120 words)Thank
you !