Book 5 Unit 1 Great Scientists預(yù)習(xí)學(xué)案
book 5 unit 1 great scientists預(yù)習(xí)學(xué)案
一.目標(biāo)聚焦
1、了解著名醫(yī)生約翰•斯諾、錢學(xué)森、哥白尼等科學(xué)家。
2、學(xué)會使用表示描述人物的句型
3. 學(xué)習(xí)過去分詞作定語和表語的結(jié)構(gòu)
二.走進課文
1. read the passage and number these events in the order that they happened.
---john snow began to test two theories.
---an outbreak of cholera hit london in 1854.
--- john snow marked the deaths on a map.
---he announced that the water carried the disease.
---john snow investigated two streets where the outbreak was very severe.
---king cholera was defeated.
---he found that most of the deaths were near a water pump.
---he had the handle removed from the water pump.
2. read the passage and answer these questions.
john snow believed idea 2 was right. how did he finally prove it?
____________________________________________________________________________
do you think john snow would have solved this problem without map? give a reason.
____________________________________________________________________________
cholera was a 19th century disease. what disease do you think is similar to cholera today? why?
____________________________________________________________________________
三.句式點擊
1. with this extra evidence john snow was able to announce with certainty that polluted water carried the virus.
with this extra evidence 有了這個額外的證據(jù)；with certainty 肯定地，有把握地
在句中作狀語，相當(dāng)于副詞.
that 引導(dǎo)賓語從句
polluted 過去分詞作定語
2. so many thousands of terrified people died every time there was an outbreak.
terrified 過去分詞作定語
every time 短語充當(dāng)連詞作用，還有 the moment/ minute /second; the first / second … last time; immediately/instantly/ directly
eg: the first time i went abroad i could hardly understand what the foreigners said.
the moment i saw him, i knew what had happened.
3. it seemed that the water was to blame.
be ﹢動詞不定式，可以表示該做或不該做的事
be to blame 應(yīng)該負(fù)責(zé)；應(yīng)受責(zé)備
eg: no one is to leave this building without the permission of the police.
you are not to drop litter in this park. 公園里不許亂丟垃圾。
who is to blame for the fire?
who is to be responsible for this?
4. only if you put the sun there did the movements of the other planets in the sky make sense.
only ﹢加狀語放于句首時，主句用部分倒裝。
eg: only a week later did i receive an answer from her.
only when you are forty and looking back will you realize that you haven’t done your best.