Zero Conditional (Easy Explanation + Worksheet)
The zero conditional is one of the most important grammar structures in English. It is used to talk about habits, facts and general truths. In this lesson, you will learn the easy uses, forms, examples and interactive practice plus free download worksheet. This lesson, you will learn zero conditional explained in Khmer and English.
What is Zero Conditional?
Zero Conditional is a grammar point used describe a result of a condition. This simply means that when a specific condition is made, there will be a result. Present simple is used in both reason and result clause, that why zero conditional is used to talk about habits and facts.
Structure of Zero Conditional
If + Present Simple, Present Simple or
Present Simple If + Present Simple
If + Present Simple : This is called the reason clause, conditional clause, or if clause)
Present Simple : This is the main clause or the result clause
Zero Conditional មាន២ផ្នែកសំខាន់ៗ ទី១៖ ប្រយោគហេតុ If + Present Simple ទី២៖ ប្រយោគផល Present Simple ។
ប្រសិនបើយើងដាក់ប្រយោគហេតុ Reason Clause មុន យើងត្រូវប្រើ comma , តែប្រសិនបើយើងប្រើយោគផល Result Clause មុន យើងមិនចាំបាច់ប្រើ នោះទេ។ ដូចឧទាហរណ៍ខាងក្រោម។
If I feel stressed, I usually go to the countryside or I usually go to the countryside if I feel stressed.
Modal Verbs that can be used in Zero Conditional Clause are:
+ May ( low possibility)
+.might ( very low possibility)
+ should ( advice)
Note
Please remember the points to to do and to avoid when using Zero Conditional as follow. សូមចងចាំនៅចំណុចមួយចំនួនដែលត្រូវ ធ្វើ និងត្រូជៀងវាងពេលប្រើប្រាស់ Zero Conditional ដូចខាងក្រោម។
- Don't use " will" កុំប្រើប្រាស់ will
- "When" can be used to replace " if" យើងអាចប្រើប្រាស់ when ជំនួសអោយ if បាន។
Examples of Zero Conditional
Habits / Routines : regular activities
If they have time, they always play soccer on the weekends.
If I am not busy, I help my family do the chores.
If I feel lazy, I usually watch a movie on my YouTube.
If you don't listen to me, I stop talking to you.
If I feels tired, I take some rest.
If my mom blames me, I just ignore.
If you don't brush your teeth regularly, your mouth stinks.
If we don't water our plants for a week, they simply die.
If I get sick, I normally get enough rest and go to see the doctor.
Facts / General Truth : Something that is always true
Here are 5 more examples of using Zero Conditional for Facts and General Truths. នេះជាឧទាហរណ៍ ចំនួន៥ដែលយើងប្រើប្រាស់ Zero Conditional ដើម្បីនិយាយអំពីការពិត។
If we don't get enough, we feel exhausted the next morning.If we heat ice, it melts.
If the temperature drops to 0, water freezes.
The sky is clear when the sun rises.
It is dark when we turn off the light at night.
Modal Verbs : can, may, might, must, should
Here are some examples of using modal verbs in Zero Conditional. នេះជាឧទាហរណ៍មួយចំនួននៃការប្រើប្រាស់ modal verbs ក្នុង Zero Conditional។
If I know English, I can travel the world.If it doesn't rain, we may go jogging in the park.
I might join the workshop tomorrow If I am free.
If you want to stay fit, you must do exercise regularly.
You should drink warm water if you catch a cold.
When Do We Use Zero Conditional?
We use Zero Conditional when we want to talk about a result or happening when a specific condition is met. The result and the happening can be habits, routines, facts or general truth.
Zero Conditional – Common Mistakes
1. Using “will” in Zero Conditional
- Wrong: If you heat water, it will boil
- Correct: If you heat water, it boils
💡 Rule:
Zero conditional = If + Present Simple, + Present Simple
2. Using Past Tense
- Wrong: If you heated ice, it melts
- Correct: If you heat ice, it melts
💡 We use present tense, not past.
3. Missing Subject or Verb
- Wrong: If rain, we stay home
- Correct: If it rains, we stay home
💡 Always include:
Subject (it, you, we…)
Verb (rains, eat, go…)
4. Wrong Sentence Order (No Comma)
- Wrong: If it rains we stay at home
- Correct: If it rains, we stay at home
💡 Use a comma (,) after the “if” clause.
5. Using “going to” or future forms
- Wrong: If you don’t eat, you are going to feel hungry
- Correct: If you don’t eat, you feel hungry
💡 Zero conditional = facts, not future plans
6. Confusing with First Conditional
- Wrong: If it rains, we will stay home ❌ (First conditional)
- Correct (Zero): If it rains, we stay home
Khmer Explanation
- If I feel stressed, I usually go out with friends.
- If we heat ice, it melts.
- I usually go fishing in the countryside if I have time on the weekend.
- I usually go fishing in the countryside when I have time on the weekend.
- If + Present Simple : ប្រយោគលក្ខ័ណ (មាន if)
- Present Simple : ប្រយោគផល
Other Conditionals
Zero Conditional KhmerFirst Conditional Khmer
Second Conditional Khmer
Third Conditional Khmer
Zero Conditional – Gap Filling Exercise
Fill in the blanks with the correct form of the verb (Present Simple).
1. If you ______ (heat) water, it ______ (boil).
2. If it ______ (rain), we ______ (stay) at home.
3. If you ______ (not eat), you ______ (feel) hungry.
4. If people ______ (exercise) regularly, they ______ (stay) healthy.
5. If you ______ (mix) red and blue, you ______ (get) purple.
6. If the sun ______ (set), it ______ (get) dark.
7. If you ______ (heat) ice, it ______ (melt).
8. If plants ______ (not get) water, they ______ (die).
9. If I ______ (drink) coffee at night, I ______ (not sleep) well.
10. If you ______ (press) this button, the machine ______ (start).
Answer Key
heat / boils
If you heat water, it boils.
rains / stay
If it rains, we stay at home.
don’t eat / feel
If you don’t eat, you feel hungry.
exercise / stay
If people exercise regularly, they stay healthy.
mix / get
If you mix red and blue, you get purple.
sets / gets
If the sun sets, it gets dark.
heat / melts
If you heat ice, it melts.
FAQ
Q1. When do we use Zero Conditional?
A : We use Zero Conditional to talk about facts and habits. It links between the condition and the result.
Q2. What tense is used in Zero Conditional ?
A : Present Tense is used. It can be present simple, present continuous and present perfect tense.
Q3. How many clauses are there in Zero Conditional?
A : There are to main clauses which are the reason or conditional clause ( the one that has "if") and the main or result clause. When reason clause is placed at the beginning a comma "," is used.
Q4. What modal verbs can be used in Zero Conditional?
A : Here are the modal verbs we use in Zero Conditional : Can / may / might / must / should
Q5. What can be used in place of " if"
A: In stead of " if" we can used " when"
Keywords
zero conditional Cambodia
zero conditional for Cambodian students
learn zero conditional Khmer students
English grammar Cambodia
Free worksheet ready to download pdf
Zero Conditional Worksheet 1 pdf
Zero Conditional exercises 2 pdf
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First Conditional
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First Conditional Khmer
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Zero Conditional Sentence Unscramble
Click the words in the correct order to make each sentence.



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