外研版 (2019)必修 第三册Unit 3 The world of science背景图课件ppt

这是一份外研版 (2019)必修 第三册Unit 3 The world of science背景图课件ppt，共14页。PPT课件主要包含了Group 1，Group 2等内容，欢迎下载使用。

Lk at the sentences frm the reading passage and answer the questins. (P38-1)
Activity 1: Lk and answer
a. I guess yu have been asked abut the title f yur bk befre.b. New inventins like 3D printers have been used t make replacement hearts and bne parts.
Q1. What has happened t “yu” in sentence (a)? Smene has asked “yu” abut the title f yur bk befre.
Q2. Wh has used new inventins t make replacement hearts and bne parts in sentence (b)?
Peple have used 3D printers t make replacement hearts and bne parts.
Lk at the sentences frm the reading passage and answer the questins.
a. I guess yu have been asked abut the title f yur bk befre.b. New inventins like 3D printers have been used t make replacement hearts and bne parts.
Q3. What is the difference between the tw grups f sentences?
c. I guess smene has asked yu abut the title f yur bk befre.d. Peple have used new inventins like 3D printers t make replacement hearts and bne parts.
passive frm with the subjects
active frm with the subjects
Q4. Why des the authr chse t use the passive frm instead f the active frm in the reading passage?
The authr chses t use the passive frm instead f the active frm t emphasise what has been dne, rather than wh r what des the actin.
以下情况一般使用被动语态
Present perfect passive
1. 不知道或者没有必要说明动作的执行者是谁。 Such bks have been written fr children. （已经为儿童编写这类图书了。）
2. 强调动作的承受者，而不强调动作的执行者。 All these prducts have been tested. （这些产品都经过测试了。）
3. 动作的执行者很模糊。 The letter has been pened. （这封信被人拆开了。）
4. 有时为了礼貌的需要，避免说出动作的执行者。 They have been tld many times nt t make nises. （已经有人多次跟他们说别那么大声了。）
Activity 2: Read and Rewrite
Rewrite the underlined parts using the present perfect passive.(P38-2)
Many things in ur lives have already been affected,
3D-printed hamburgers have been served t custmers in sme restaurants in Lndn. But perhaps the mst significant success that has been achieved t date is in medicine.
Human bdy parts, including a beating heart, have been made with 3D printing technlgy.
A new 3D-printed shell has been given t a turtle injured in a frest fire!
Activity 3: Imagine yu are Dr Mre. Lk at the pictures and tell the plice abut the damage and lss t yur lab. Use the present perfect passive where apprpriate. (P39-3)
Imagine yu are Dr Mre. Lk at the pictures and tell the plice abut the damage and lss t yur lab. Use the present perfect passive where apprpriate. (P29)
1. The lck n the dr has been brken.
2. The windw has been brken.
3. My tw laptps have been stlen.
4. Beakers and test tubes have been destryed.
5. The bk case has been pened, and sme files have been taken away while thers have been thrwn everywhere.
6. The rbt has been damaged.