Module 5 A lesson in a lab
新擴建的廣場為以前的四倍大。
5.其它
i'm twice/ double his age. 我的年齡是他的兩倍。
i've paid five times the usual price for the stamp.
我出了5倍于往常的價格買這枚郵票。
the average income of the staff has been increased by 50 percent compared with last year. 與去年相比，該單位職工的
收入增加了50%.
the price of tvs are twofold( adj. 兩部分的, 雙重的) down over these years.
近幾年來，電視機的價格下降了兩倍。
the +比較級……，the +比較級……
意為“越……，越……”。前面部分是從句，后面部分是主句。
the harder you work, the more successful you will be.
the earlier you come, the better place you can find.
“比較級+and+比較級”
表示“越來越……”。
he becomes fatter and fatter.
比較級前還可以用much，even，still，a little等來修飾。
ⅶ home work
deal with the exercises on pages 45 , 46 and 47
module 5 a lesson in a lab
period 2
teaching aims:
1. revise the usage of degrees of comparison by translating some sentences.
2. know more about the two experiments
teaching steps:
i. translate the following sentences into english.
1.這座新大樓是那幢舊樓的3倍大小。
the new building is three times the size of the old one.
the new building is three times larger than the old one.
the new building is three times as large as the old one.
2.孫老師說英語和你一樣流利。
mr sun speaks english as fluently as you.
3.他越努力學習，就越感到快樂。
the harder he works, the happier he feels.
4.那個女孩越長越漂亮了。
the girl becomes more and more beautiful.
ii. come to the reading and vocabulary.
ask the question: what are the stages of a scientific experiment?
they are as follows: aim—method---result—conclusion
now read passage a and finish activities 2 and 3.
answer:
the reaction of metals
answers:
1. potassium, calcium, and sodium
2. it burns to form an oxide
3. magnesium, aluminum, and zinc
4. it has a slow reaction.
5. no, it doesn’t.
iii. prepare for the test.
prepare some test tubes, some oil, test tube holder, cotton wool, iron nails, bunsen burner. describe the experiment to the students and ask the students to explain what will happen in the end.
ask the students to read passage b and try to fill in the table on page 45.
answers:
iron in dry air iron in air-free water iron in ordinary water
stage a
starting experiment cotton wool water water
stage b
1 week later nails water
stage c
result iron doesn’t rust iron does not rust. iron rusts.