Introduction: Who did it? Or what happened?

Hello! Today, we are going to learn a very useful grammar "trick" called the Passive Voice. Usually, when we speak, we focus on who is doing something ("The chef cooks the food"). But sometimes, we care more about the thing being done ("The food is cooked").

In this chapter, we will learn how to shift our focus and use simple structures to describe actions in a new way. This is a key skill for describing food, school rules, and even science experiments!

1. What is the Passive Voice?

In a normal sentence (Active Voice), the "doer" comes first. In a Passive Voice sentence, the "receiver" of the action comes first.

Imagine a football game:
Active: The player kicks the ball. (Focus on the player)
Passive: The ball is kicked by the player. (Focus on the ball)

Did you know? We often use the Passive Voice when we don't know who did the action, or when the "doer" isn't as important as the result!

2. The Magic Formula

To make a simple passive sentence in English, you only need two main ingredients after your subject. Here is the formula:

\( \text{Subject (Receiver)} + \text{is / are} + \text{Verb 3 (Past Participle)} \)

Choosing "is" or "are":

We choose the "Verb to be" based on the new subject at the front of the sentence:

  • Use is for singular subjects (one thing). Example: The apple is eaten.
  • Use are for plural subjects (many things). Example: The apples are eaten.

What is "Verb 3"?

The Past Participle (Verb 3) is the form of the verb we use for passive voice.
- For regular verbs, it usually ends in -ed (e.g., played, cleaned, cooked).
- For irregular verbs, the spelling changes (e.g., eat \(\rightarrow\) eaten, break \(\rightarrow\) broken, write \(\rightarrow\) written).

3. Step-by-Step: Changing Active to Passive

Don't worry if this seems tricky! Follow these four simple steps to change a sentence:

Active Sentence: "Students wear uniforms."

  1. Find the object (the thing receiving the action): uniforms.
  2. Move the object to the front: Uniforms...
  3. Add 'is' or 'are': Since "uniforms" is plural, we use are.
  4. Change the verb to Verb 3: The V3 of "wear" is worn.

Passive Result: "Uniforms are worn by students."

4. Examples in Everyday Topics

Here is how we use the passive voice in the topics you study at school:

Food and Drink

"The rice is grown in Thailand."
"Many delicious desserts are sold in this shop."

Environment and Science

"The trash is collected every Monday."
"Trees are planted to help the environment."

School and Daily Life

"The classroom is cleaned after school."
"English is spoken all over the world."

5. Common Mistakes to Avoid

1. Forgetting the "Verb to be":
Incorrect: The book written by him.
Correct: The book is written by him.

2. Using the wrong Verb form:
Incorrect: The cake is bake by my sister.
Correct: The cake is baked by my sister. (Always use Verb 3!)

3. Forgetting "by":
If you want to mention who did the action, always use the word by.
Example: This song is sung by a famous singer.

Quick Review: Key Takeaways

- Purpose: Use passive voice to focus on the action or the thing receiving it.

- The Pattern: \( \text{is / are} + \text{Verb 3} \).

- Singular vs. Plural: Check your subject! One thing = is. More than one = are.

- Memory Tip: Think of the "Be + 3" rule. You always need a form of "to be" and a "Verb 3"!