1. English Grammar I
Unit 10: Passive Voice

2. Unit 10: Passive Voice 10-1 The passive voice
English has active voice and passive voice. The active voice is used to express the subject does something whereas the passive voice is used to express that something is done by the subject. The passive voice is always used in scientific report, where the performer is not really important but the process or principle is.

3. Unit 10: Passive Voice
Active voice: My grandmother grows these organic vegetables.
Passive voice: These organic vegetables are grown by my grandmother.
＊If the agent is important, use "by"
The book was written by J.K. Rowling.
Helen is fired by her supervisor.

4. Unit 10: Passive Voice 10.1-1 The formation of passive voice
The passive voice consists of two parts: a form of the verb "to be" + past participle:

5. Unit 10: Passive Voice Active Voice Passive Voice
I write a letter every week.
A letter is written every week.
I am writing a letter now.
A letter is being written.
I wrote a letter yesterday.
A letter was written yesterday.
I will write a letter tomorrow.
A letter will be written tomorrow.

6. Unit 10: Passive Voice Active Voice Passive Voice
I have written a letter for two hours.
A letter has been written for two hours.
I should write a letter to my parents.
A letter should be written to my parents.

7. Unit 10: Passive Voice
Exercise: Use passive voice to complete each sentence
At our school, English ________ (teach) by native speakers.
In Europe, credit cards _______ (accept) in almost all of the stores.
The most expensive cars _____ (manufacture) in Germany.

8. Unit 10: Passive Voice
“ Gone with the Wind” is a famous book. It _________ (read) by billions of readers.
A new bridge across the river ______ (build) by the City Government now.
Bob got injured and __________ (take) to the hospital by an ambulance.
Rice _______ (grow) by farmers in China for four thousand years.
The 2008 Olympic Games ______ (hold) in Beijing.

9. Unit 10: Passive Voice
Exercise : Complete each sentence with active voice or passive voice
The first telephone __________ (invent) by Bell.
Before leaving the house, they _____ (turn off) the light.
The letter ______ (mail) a week ago and it ________(arrive) yesterday.

10. Unit 10: Passive Voice
Ron’s mother ________ (die) when he was young, and he _______ (bring) up by his father.
I _____ (born) in Taipei but I ______ (grow) up in Kaohsiung.
The clothes____________ (wash) now.
Walt Disney World __________ (build) in 1900s.