1. PASSIVE VOICE
Re-introduction

2. Active to Passive Somebody cleans the office every day.
PRESENT
SIMPLE
Active to Passive
Active
Somebody cleans the office every day.
[ Subject + Verb (present simple) + object ]
The office is cleaned every day.
[ Object + “TO BE” (present simple) + Verb 3 ]
Passive

3. Practice: Present Simple
[ Object + “TO BE” (present simple) + Verb 3 ]
Change the sentence from active to passive:
She plays games every day.
We clean the classroom.
Someone loves me.

4. Practice: Present Simple
[ Object + “TO BE” (present simple) + Verb 3 ]
Change the sentence from active to passive:
She plays games every day.
Games are played (by her).
We clean the classroom.
The classroom is cleaned (by us).
Someone loves me.
I am loved (by someone).

5. Active to Passive Somebody cleaned the office yesterday.
PAST
SIMPLE
Active to Passive
Active
Somebody cleaned the office yesterday.
[ Subject + Verb (past simple) + object ]
The office was cleaned yesterday.
[ Object + “TO BE” (past simple) + Verb 3 ]
Passive

6. [ Object + “TO BE” (past simple) + Verb 3 ]
Practice: Past Simple
[ Object + “TO BE” (past simple) + Verb 3 ]
Change the sentence from active to passive:
I turned on the TV.
A friend invited her to a party.
Some people ate pizza yesterday.

7. [ Object + “TO BE” (past simple) + Verb 3 ]
Practice: Past Simple
[ Object + “TO BE” (past simple) + Verb 3 ]
Change the sentence from active to passive:
I turned on the TV.
The TV was turned on (by me).
A friend invited her to a party.
She was invited to a party (by a friend).
Some people ate pizza yesterday.
Pizza was eaten yesterday (by some people).

8. PASSIVE VOICE: always uses the verb “to be”
TENSE
“TO BE”
Present simple
Am/is/are
Present continuous
Am/is/are + being
Present perfect
Has/have + been
Past simple
Was/were
Past continuous
Was/were + being
Past perfect
Had + been
Modal
Can/Should/Will (etc) + BE

9. Practice: Every Tense Change these sentences from active to passive:
Someone has eaten all the pizza.
They are building a temple.
A person was singing a song.
My friends had cleaned the room.
You shouldn’t take out too many books from the library at once.

10. When To Use 1. We don’t know who did the action.
Five people have been killed!
2. We want to pay attention to the action, not the “doer.” (We don’t care who did it.)
The killer was arrested yesterday!

11. When To Use
3. If we want to pay extra attention to the “doer”, we use “by…”
The killer was discovered by a small child!

12. When NOT to Use
YOU CANNOT USE PASSIVE VOICE IF YOUR SENTENCE DOES NOT HAVE AN OBJECT.
Math class is difficult.
Jane is a really crazy girl.
If the “doer” is obvious (ชัดเจน) but not really important.
I was driving my car when I saw a monkey dancing!
My mom bought me some new underpants.