Grammar: B2 section "✨ Grammar Essentials: 🧩 Parts of Speech & 🏗️ Sentence Structure (Advanced)" is: L1: Non-Defining Relative Clauses (using who, which, with commas)

ESL Cambodia 🇰🇭
Extra Information
Non-Defining Relative Clauses
Dara , who is my friend , lives in Kep.
The commas act like handles holding the extra box.
If you remove the box, the sentence is still true!
"Dara lives in Kep."
🧠 The Rules
  • Use commas (,) before and after.
  • Use who for people.
  • Use which for things.
  • NEVER use "that" in these clauses! ❌

Examples (ឧទាហរណ៍)

My mother, who loves cooking, makes great curry.
ម៉ាក់របស់ខ្ញុំ ដែលគាត់ចូលចិត្តធ្វើម្ហូប ធ្វើការីឆ្ងាញ់ណាស់
Angkor Wat, which is in Siem Reap, is very old.
ប្រាសាទអង្គរវត្ត ដែលស្ថិតនៅក្នុងខេត្តសៀមរាប គឺមានវ័យចំណាស់ណាស់
I visited Paris, which is beautiful.
ខ្ញុំបានទៅលេងប៉ារីស ដែលស្រស់ស្អាត

Necessary vs Extra

Do we need the info?

Type Example
Defining
(Necessary info)
No commas!
The woman who called me is angry.
(Which woman? Only the one who called.)
Non-Defining
(Extra info)
Use commas!
My mom, who called me, is angry.
(I know who "my mom" is. The call is just extra info.)
Quick Tip 💡

If it's a Name (Dara, Cambodia, Toyota), it is usually Non-Defining. Use commas!

Grammar Check ⚡

Choose the correct punctuation.

Mr. Sok ___ is my teacher ___ is very kind.
London ___ is a big city.
The boy ___ sits next to me is smart. (Defining - We need to know WHICH boy)

Mission 📝

Add extra info!

Combine sentences:

Rewrite these in your notebook using commas.

  • 1. My brother lives in USA. He is a doctor.
    My brother, who is a doctor, lives in USA.
  • 2. Phnom Penh is hot. It is the capital.
    ➔ Phnom Penh, which __________, is hot.
  • 3. Lisa speaks English well. She is my friend.
    ➔ Lisa, who __________, speaks English well.

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