资源简介

(共27张PPT)
Grammar in use
沪教版（五四）2024 英语 八年级 第一学期
Unit 6 Life in the future
Objectives 教学目标： 通过本节课的学习，学生
1. 能够掌握英语的条件状语从句的含义和句型关系，并能够初步简单的理解语法规则。（学习理解）
2. 能够根据语法规则，运用条件状语从句if, if ... not, unless 来造句，完成假设条件的sentence chain练习，并根据语境的条件开展适当的畅想。（应用实践）
3. 能够在完成练习的过程中了解并深入思条件状语从句的用法，并意识到并非所有的新兴科技都会指向更加美好的未来，有时也会带来其他的问题。（迁移创新）
Adverbial clauses of condition
/k n d n/ n. 条件、状态
Read and think
What do the underlined parts express
(1) If I visit Egypt in the future, I’ll fly around the pyramids in a jetpack.
(2) Robots will become friends with us if we use them wisely.
(3) It won’t be possible unless I cut school and fly to Egypt.
1) We use conditional clauses (See the underlined parts above.)
to describe a possible situation action result that allows
the possible result in the main clause to happen.
with the present simple future.
(2) The conditional clause comes before after either before or
after the main clause. We use a comma when the conditional
clause comes before after the result clause.
(3) We can use unless to replace if if ... not.
Work out the rules
Tick (√) the one(s) you agree with.
√
√
√
√
√
Grammar file
Adverbial clauses of condition 条件状语从句
An adverbial clause of condition (also called “conditional clause”) is introduced by if/ unless, followed by the present simple. We use adverbial clauses of condition to talk about the general truth, or the possible result of a possible situation or action.
条件状语从句 ( 又称“条件分句”) 由 if 或 unless 引导，用一般现在时表示将来。
条件状语从句常用来表示一般事实或某些情形或行动可能产生的结果。
Grammar file
In the main clause (the result clause), we use the present simple to express the general truth, and use the future with will to express the possible result in the future.
主句（即结果分句）中，用一般现在时表示一般事实，用将来形式 will 表示将来可能发生的结果。
Grammar file
General truth (present simple) 一般事实（一般现在时） Action (present simple)
动作（一般现在时）
Ice melts if you put salt on it.
Grammar file
Possible result (the future with will) 可能的结果（will 表示一般将来时） Situation (present simple)
情形（一般现在时）
The Earth will be too crowded if the population grows too fast.
Grammar file
The conditional clause comes before or after the result clause. Use a comma (,) after the conditional clause when it comes before the result clause.
条件分句可出现在结果分句之前或之后。当条件分句出现在结果分句之前时，需要在其后加逗号（,）。
Grammar file
Condition 条件 Result 结果
If I have a robot friend, I’ll play games with it.
If any part of one’s body isn’t healthy, doctors will print a “new” one with 3D printers.
Grammar file
Result 结果 Condition 条件
Will you play games with a robot friend if you have one
Doctors will print a “new” one with 3D printers, if any part of one’s body isn’t healthy.
Grammar file
We use unless to mean if ... not in negative adverbial clause of condition.
用 unless 引导的肯定条件分句和 if 引导的否定条件分句意思相同。
e.g. Unless we take immediate action, global warming will get more serious.
= If we don’t take immediate action, global warming will get more serious.
What will happen if ...
Practise: P 92
Professor Huang is asking questions about life in the future.
(1) Match the pictures with the possible results A–C.
improve health care
( )
use solar and wind
energy ( )
cut down trees ( )
A. Global warming will begin to slow down.
B. People will live to an average age of 120.
C. Half of the Amazon rainforest will disappear.
B
A
C
1) Prof Huang: What will happen if we improve health care
Student: __________________________________________________
__________________________________________________
2) Prof Huang: ______________________________________________
Student: __________________________________________________
__________________________________________________
(2) Use if or unless to complete the questions and answers with the information above.
Practise: P 93
If we improve health care, people will live to an average age of 120.
What will happen if we use solar and wind energy
If we use solar and wind energy, global warming will begin to slow down.
3) Prof Huang: ______________________________________________
Student:__________________________________________________
__________________________________________________
(2) Use if or unless to complete the questions and answers with the information above.
Practise: P 93
If wecut down trees, half of the Amazon 亚马逊 rainforest 雨林 will disappear.
What will happen if we cut down trees
Use if to talk about the future. Read the following example. Take turns to make a chain of sentences.
Play a game: P 93
If I fly to Mars, I will plant a tree there.
If I become an astronaut, I will fly to Mars.
If I plant a tree on Mars, _____________________________ .
If I water it everyday, I will bring enough liquid with me to the Mars and even build a house.
I will water it every day.
Your chain
If we improve health care, most of the people will live to 120 years old.
If most of us live to 120 years old, we can do many more things, but the earth will be too crowded.
If the earth is too crowded, resourses will be limited and there will be more severe problems.
1. Unless you ________ harder, you won’t pass the exam.
A. work B. worked C. will work D. have worked
Other exercises
A
- 解析：除非主句是过去时，否则“unless”引导的条件从句用一般现在时（work）表示将来。
2. If I__________ you, I would accept the job offer.
A. am B. were C. would be D. be
- 解析：虚拟条件句中，if从句用过去式（were）表示与现在事实相反的假设。
B
3. Even if it ________ sunny, I will take an umbrella.
A. will be B. is C. was D. has been
Other exercises
B
- 解析：even if引导的条件从句用一般现在时（is）表示普遍情况，主句用一般将来时（will take）。
4. As long as you _______the book tomorrow, you can borrow it.
A. return B. returned
C. will return D. have returned
- 解析：as long as引导的条件从句用一般现在时（return），主句用情态动词（can borrow）。
A
5. If he___________ hard, he will pass the exam.
A. study B. studies C. studied D. is studying
Other exercises
B
- 解析：主句用一般将来时（will pass），从句用一般现在时（studies）表示条件。
6. Provided that you _______your homework, you can watch TV.
A. finish B. finished
C. will finish D. are finishing
- 解析：provided that引导的条件从句用一般现在时（finish），主句用情态动词（can watch）。
A
7. In case it_______, we have prepared an indoor activity.
A. rained B. rains C. will rain D. is raining
Other exercises
B
- 解析：in case引导的条件从句用一般现在时（rains），主句用现在完成时（have prepared）。
8. Once you _____________the rule, you will find it easy.
A. understand B. understood
C. will understand D. have understood
- 解析：once引导的条件从句用一般现在时（understand），主句用一般将来时（will find）。
A
9. If it ______________ (not rain) tomorrow, we will go to the park.
Other exercises
- 解析：主句用一般将来时（will go），条件从句用一般现在时（does not rain）表示将来。
10. Unless you ________ (work) harder, you won’t get the full prize.
- 解析：unless引导的条件从句用一般现在时（work），主句用一般将来时（won’t get the full prize）。
work
does not rain
11. If I ________ (be) you, I would accept the offer.
Other exercises
- 解析：虚拟条件句中，if从句用过去式（were）表示与现在事实相反的假设。
12. As long as you ________ (return) the magazine on time, you can borrow it again.
- 解析：as long as引导的条件从句用一般现在时（return），主句用情态动词（can borrow）。
return
were
13. 如果你明天早起，我们就能赶上最早的火车。
Other exercises
If you get up early tomorrow, we will catch the earliest train.
14. 除非爸爸努力学习，否则他不会拿到执业证书。
Unless dad studies hard, he won’t get his Practicing Certificate.
15. 如果公主来参加聚会，请告诉我们。
Other exercises
If the princess comes to the party, please let us know.
16. 一旦你们完成作业，就可以出门打球做运动了。
Once you finish your homework, you can go out, play ball games and do some sports.
Homework
1. 基础作业：完成教材配套的练习册内容，
完成条件状语从句的练习卷。
2. 进阶作业：以 “英语的条件状语从句” 为主题，画一幅美观的 思维导图，表达展示自己的所学所得。

展开更多......

收起↑