Writing: B1 - Lesson 2: Writing a Clear Topic Sentence

Writing: B1

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The Topic Sentence

ប្រយោគប្រធាន (ប្រយោគសំខាន់បំផុតក្នុងកថាខណ្ឌ)

The topic sentence is the "boss" of the paragraph. It tells the reader exactly what the paragraph is about.

ប្រយោគប្រធាន គឺជាមេនៃកថាខណ្ឌ។ វាប្រាប់អ្នកអានឲ្យដឹងច្បាស់ថា កថាខណ្ឌនោះនឹងនិយាយអំពីអ្វី។

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Where does it go? 📍

តើវាស្ថិតនៅកន្លែងណា?

The topic sentence is usually the first sentence of the paragraph. It guides everything that comes after it.

Example Paragraph There are three main reasons why learning English is important. First, it helps you find a good job. Second, you can communicate with people around the world. Finally, it allows you to access more information online. (ប្រយោគពណ៌ខៀវ គឺជាប្រយោគប្រធាន។ វាស្ថិតនៅខាងដើមគេជានិច្ច។)

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The Formula 🧩

រូបមន្តនៃការសរសេរ

A perfect topic sentence has two parts: The Topic and the Controlling Idea.

1. The Topic What What are you writing about? (អ្វីដែលយើងកំពុងនិយាយអំពី / ប្រធានបទរឿង)

2. The Controlling Idea Specifics What specific point do you want to make about the topic? (គំនិតកំណត់ព្រំដែន / អ្វីដែលយើងចង់និយាយជាក់លាក់ពីប្រធានបទនោះ)

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Good Examples 📝

ឧទាហរណ៍ល្អៗ

Let's put the formula into practice: Topic + Controlling Idea

Dogs make great pets because they are loyal and fun. (ឆ្កែ + គឺជាសត្វចិញ្ចឹមដ៏ល្អ ព្រោះវាស្មោះត្រង់និងគួរឲ្យស្រឡាញ់។)

Eating fast food every day is bad for your health. (អាហារទាន់ចិត្ត + គឺមិនល្អចំពោះសុខភាពអ្នកទេ។)

The Goldilocks Trap!

Not too broad, not too narrow.

(កំហុសទូទៅ: ប្រយោគប្រធានមិនត្រូវទូលាយពេកទេ ហើយក៏មិនត្រូវចង្អៀត/លម្អិតពេកដែរ។ ត្រូវនៅកណ្តាលល្មម!)

Too broad (ទូលាយពេក): "Animals are interesting."
(There are millions of animals. Be more specific!)

Too narrow (លម្អិតពេក): "My dog's name is Rex."
(This is just a small fact. You can't write a whole paragraph about his name.)

Just Right (ល្មមល្អ): "Dogs are very smart and can learn many tricks." ✅

Quick Check ⚡

ការត្រួតពិនិត្យរហ័ស

Location Check

Where is the topic sentence usually located?

(តើប្រយោគប្រធានជាធម្មតាស្ថិតនៅត្រង់ណា?)

The Formula

What are the two parts of a topic sentence?

(តើអ្វីខ្លះជាផ្នែកទាំងពីរនៃប្រយោគប្រធាន?)

THE TRAP! ❌

"I like apples." Is this a good topic sentence?

(តើប្រយោគនេះជាប្រយោគប្រធានល្អដែរឬទេ?)

Identify the Topic

"Smartphones have changed the way we communicate." What is the topic?

(តើអ្វីជាប្រធានបទក្នុងប្រយោគនេះ?)

Identify Controlling Idea

"Living in the city is very expensive." What is the controlling idea?

(តើអ្វីជាគំនិតកំណត់ព្រំដែនក្នុងប្រយោគនេះ?)

Mission 🎯

អនុវត្តផ្ទាល់!

Paragraph Hunt 🔍 (បើកសៀវភៅភាសាអង់គ្លេសមួយក្បាល រកមើលកថាខណ្ឌមួយ ហើយគូសបន្ទាត់ពីក្រោមប្រយោគប្រធាន (Topic sentence) របស់វា។)

Mission 🎯

អនុវត្តផ្ទាល់!

Write it down ✍️ (សរសេរប្រយោគប្រធាន ១ ទាក់ទងនឹងចំណូលចិត្តរបស់អ្នក។ ត្រូវមាន Topic + Controlling Idea។ ឧ. Playing football keeps me healthy.)

Mission 🎯

អនុវត្តផ្ទាល់!

Teach a friend 🙋‍♂️ (ពន្យល់មិត្តភក្តិរបស់អ្នកពីភាពខុសគ្នារវាង "Topic" និង "Controlling Idea"!)

Mission 🎯

អនុវត្តផ្ទាល់!

Voice Note 🎤 (ថតសំឡេងខ្លួនឯងអានប្រយោគប្រធានដែលល្អមួយ។ ឧ. "Eating fast food every day is bad for your health.")

Video Lesson

មេរៀនជាវីដេអូ

Ask a Question 🙋‍♂️

តើអ្នកមានចម្ងល់មែនទេ? សួរគ្រូនៅទីនេះ!

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Recent Questions

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Seyha 2 hours ago

Does the topic sentence ALWAYS have to be the first sentence?

Reply 👍 15

SP

Sopheak Pich Teacher 1 hour ago

Not always, but 90% of the time in English academic writing, yes! Putting it first makes it much easier for the reader to understand what your paragraph is about immediately. ✍️

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Vanna 5 hours ago

What is a "controlling idea" again? I'm a bit confused.

Reply 👍 8

SP

Sopheak Pich Teacher 4 hours ago

Think of the topic as the "Who/What" (e.g., Cambodia). The controlling idea is "What specifically do you want to say about it?" (e.g., ...has beautiful temples). It limits what you will talk about so you don't go off-topic! 🎯

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Minea 8 hours ago

Can a topic sentence be a question? Like "Why do dogs make good pets?"

Reply 👍 5

SP

Sopheak Pich Teacher 7 hours ago

Sometimes a paragraph starts with a question to catch attention (a "hook"), but the REAL topic sentence should be a statement that answers it right after. So it's better to stick to statements for your topic sentences at B1 level! 📝