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Unit5 Power of ideas
Grammar Focus
2026新人教版九上
By the end of this lesson, we will be able to：
1. recognize the structure of the passive voice and understand when to use
the passive voice in English.
2. complete grammar exercises in the textbook and use the passive voice to
describe inventions.
3. talk about how inventions are made using the passive voice.
Learning Objectives
Guess the Invention
Warm up
1. Look at the picture clues of invention parts.
2. Guess what invention it is.
3. Say the name in English.
4. Talk with your partner: What is it used for
It helps people talk to others far away. It was invented in the 19th century.
Guess the Invention
Warm up
1. Look at the picture clues of invention parts.
2. Guess what invention it is.
3. Say the name in English.
4. Talk with your partner: What is it used for
It gives us light. Thomas Edison improved it. It was made of glass and metal.
Guess the Invention
Warm up
1. Look at the picture clues of invention parts.
2. Guess what invention it is.
3. Say the name in English.
4. Talk with your partner: What is it used for
It has two wheels. It doesn't use fuel. It is good for exercise and the environment.
Guess the Invention
Warm up
1. Look at the picture clues of invention parts.
2. Guess what invention it is.
3. Say the name in English.
4. Talk with your partner: What is it used for
It's in your pocket. You can call, text, play games and learn with it.
Lead-in
Read the sentences. Circle the verbs in the passive voice.
A mini-camera is connected to the front of the glasses.
The oil and salt are also added by the machine itself.
Toys, chairs, tables, and even houses can all be made by the 3D printer.s
A radio message was sent across the Atlantic Ocean for the first time in 1901.
Lead-in
Think: What do these sentences have in common
These sentences all describe what happens to the subject, not who does the action.
They all use the structure: be verb + past participle.
They focus on the action being done to something, not who is doing it.
The passive voice
Structure of the Passive Voice
Subject + be + past participle + (by + agent)
be verb: Changes according to tense and subject (am/is/are/was/were/be/been)
past participle: Regular verbs add -ed; irregular verbs have special forms (e.g. written, made, sent)
Active vs Passive Voice
Active: Alexander Bell invented the telephone.
[强调：贝尔做了发明这个动作]
Passive: The telephone was invented by Alexander Bell.
[强调：电话经历了“被发明”这个过程]
The passive voice in different tenses
The passive voice across tenses
Tense Structure Example
Present Simple am/is/are + past participle English is spoken here.
Past Simple was/were + past participle This building was built in 1990.
Future Simple will be + past participle The work will be finished tomorrow.
Present Continuous am/is/are being + past participle A new road is being built near our school.
Present Perfect have/has been + past participle The homework has been done.
Modal Verbs modal + be + past participle It can be made by a 3D printer.
The passive voice
When do we use the passive voice
1. When the doer (who does the action) is unknown or unimportant:
My bicycle was stolen.
2. When we want to focus on the action or the receiver of the action:
The building was completed in 2020.
3. In formal or scientific writing:
The experiment was conducted carefully.
4. When describing processes:
The paper is cut into small pieces.
5. When describing inventions, manufacturing processes, or historical events:
Penicillin was discovered by Alexander Fleming.
The passive voice
Common passive sentence patterns
It is said that... (据说......)
It is believed that... (人们相信......)
It is known that... (众所周知......)
It is reported that... (据报道......)
It is expected that... (预计......)
1.The telephone ____________ (invent) by Alexander Bell in 1876.
2.People all over the world ___________ (connect) to each other through the
internet.
3.The word "robot" ___________ (introduce) for the first time in a play in 1920.
4.It wasn't supposed to make such a loud noise when the button _____________
(press) to start the machine.
5.It is believed that the world's oldest wheel ________ (find) in Eastern Europe.
Complete the sentences with the correct forms of the verbs in brackets.
Let’s practise
was invented
are connected
was introduced
was pressed
was found
注意时间状语和主谓一致。先确定主语是单数还是复数，
再根据时间状语判断时态。
The Qinghai-Xizang Railway was completed in 2006. It 1. ________ (connect) Xining to Lhasa, a huge distance of 1,956 kilometres, and it is the highest railway in the world, reaching 5,072 metres above sea level at Tanggula Pass.
The building of the railway was a great challenge. Creative ideas 2. ____________ (need) to solve different problems. In summer, the top layer of the frozen ground would melt and become too soft to build on, so pipes 3. __________ (use) to keep the ground hard. However, in some places, it was
Complete the passage with the correct forms of the verbs in brackets. Make a profile of the Qinghai-Xizang Railway.
Let’s practise
connects
were needed
were used
impossible to build the railway over the frozen ground, so tunnels had to 4. ________ (create) instead. In some other places, bridges 5. __________ (build) to keep the railway up above the ground. These bridges are animal-friendly and 6. ______ (allow) animals to pass under the tracks.
Let’s practise
be created
were built
allow
Complete the passage with the correct forms of the verbs in brackets. Make a profile of the Qinghai-Xizang Railway.
As an important and successful project, the railway has 7. ________ (increase) tourism and economic development in the area. The lessons learnt and experience gained from building this railway will help 8. _________ (improve) transport in other similar places in the world.
Complete the passage with the correct forms of the verbs in brackets. Make a profile of the Qinghai-Xizang Railway.
Let’s practise
increased
（to）improve
World's highest railway (最高铁路)
Length: 1,956 km (长度)
Tanggula Pass: 5,072 m above sea level (唐古拉山口海拔)
Completed in 2006 (建成时间)
Overcame frozen ground challenges (克服冻土难题)
Animal-friendly bridges (动物友好型桥梁)
Group work
Describe an Invention
Invention Reporters
Task: Your group is a news team. Choose ONE invention and prepare a short "news report" (3 sentences) using the passive voice.
Time: 5 minutes’ preparation, 1 minute’s presentation per group.
Requirements: Each report must include at least 3 sentences in the passive voice.
Show time
language correct form(形式正确)
accurate meaning(意义精确)
proper use(使用恰当)
performance gentle(仪态文雅)
confidence (自信)
OK Good Excellent
Every great invention starts with a simple idea. Your ideas can change the world too.
that
Fill in the blanks.
1.The laptop ___________ (design) in China.
2.Many books ___________ (write) by this author.
3.The room ___________ (clean) every day.
4.The cake __________ (make) by my mother yesterday.
5.The problem ____________ (solve) soon.
6. English _________ (speak) in many countries.
is designed
were written
is cleaned
was made
will be solved
is spoken
Exercise
Change to the passive voice.
1.They built this school in 1990.
___________________________________________________
2.People use computers all over the world.
___________________________________________________
3.He will finish the work tomorrow.
__________________________________________________
4.She is cooking dinner now.
__________________________________________________
5.They have planted many trees.
___________________________________________________
This school was built in 1990.
Computers are used all over the world.
The work will be finished tomorrow.
Dinner is being cooked now.
Many trees have been planted.
Exercise
Use the prompts to write sentences in the passive voice.
1.The telephone / invent / 1876
____________________________________________________
2.English / speak / many countries
____________________________________________________
3.This computer / make / Japan
___________________________________________________
4.The new hospital / build / next year
__________________________________________________
5.The window / break / yesterday
_________________________________________________
The telephone was invented in 1876.
English is spoken in many countries.
This computer was made in Japan.
The new hospital will be built next year.
The window was broken yesterday.
Basic homework
Practical homework
Research online: Find a picture of an interesting invention. Write a short paragraph (5—6 sentences) about it. Use at least 3 sentences in the passive voice.
Extended homework
Write 5 sentences using the passive voice.
Choose one invention (e.g. bicycle, computer, paper). Write 3 sentences about it using the passive voice.

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