Zero Conditional: Use It in Real Talk With 40 Examples
Quick answer: The zero conditional talks about things that are always true when something happens. The formula is: If (or When) + present simple, present simple. Example: If you heat ice, it melts. Use it for facts, habits, rules and instructions.↗ Share on X
The zero conditional is the sentence you use for things that are always true when something happens. The formula is short: If (or When) + present simple, present simple. For example: *If you heat ice, it melts.* *If I skip breakfast, I get a headache.* You use it for facts, habits, rules and instructions. That is the whole idea. The rest of this article shows you how to use it in real conversations without stopping to think.
What does the zero conditional look like?
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Easy tricks to remember English prepositions forever →Every zero conditional has two parts:
- The condition: the "if" part. What happens first.
- The result: what always happens after that.
Both parts use the present simple. That means the basic form of the verb, with -s for he, she and it.
| Condition (If / When + present simple) | Result (present simple) |
|---|---|
| If you press this button, | the machine stops. |
| When it rains, | the streets flood. |
| If my son eats candy at night, | he doesn't sleep. |
| When you mix red and blue, | you get purple. |
You can also flip the order. Then you do not need a comma:
- *The machine stops if you press this button.*
- *My son doesn't sleep if he eats candy at night.*
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When do native speakers actually use it?
Grammar books love science examples like "water boils at 100 degrees." Real people use the zero conditional much more for daily life. Here are four situations where you will hear it all the time.
1. Talking about your habits
These sentences describe what you usually do.
1. If I'm tired, I go to bed early.
2. When I get home, I take off my shoes.
3. If I have time, I walk to work.
4. When I'm stressed, I listen to music.
5. If it's cold, I drink tea.
6. When my phone dies, I use my laptop.
7. If I don't drink water, I feel weak.
8. When I travel, I always pack too much.
9. If I'm late, I call my boss.
10. When I cook, I make a big mess.
2. Giving instructions and explaining how things work
This is very common at work and in customer service.
11. If the printer jams, open the side door.
12. If you forget your password, click "reset."
13. When the light turns green, the system is ready.
14. If the screen freezes, hold the power button.
15. When a customer complains, we write it in the log.
16. If you need help, press zero.
17. When the alarm rings, everyone goes outside.
18. If the package is damaged, take a photo.
19. When you finish, save the file.
20. If the code doesn't work, restart the app.
Notice something: in instructions, the result is often an imperative (an order), like *open*, *click*, *take*. That is still correct zero conditional.
3. Talking about health and the body
21. If I eat too fast, my stomach hurts.
22. When I don't sleep, I lose focus.
23. If you stand up too fast, you feel dizzy.
24. When I run in the morning, I have more energy.
25. If I drink coffee after 4 p.m., I stay awake.
26. When the baby is hungry, she cries.
27. If you touch a hot pan, you get burned.
28. When my allergies start, my eyes itch.
29. If I sit all day, my back hurts.
30. When you laugh, you feel better.
4. Rules, laws and general facts
31. If you don't pay the bill, they cut the power.
32. When you break the rules, you get a warning.
33. If you park here, you get a ticket.
34. When the store closes, the doors lock.
35. If you mix oil and water, they don't combine.
36. When the sun goes down, it gets cold in the desert.
37. If plants don't get light, they die.
38. When you freeze water, it turns into ice.
39. If you drop a glass on tile, it breaks.
40. When prices go up, people buy less.
Say these out loud. Your mouth needs to learn the pattern, not just your eyes.
What are the most common mistakes?
How to Use Modal Verbs for Giving Advice in English →
Daily habits to fix English grammar mistakes at work →
Daily Conversation Practice Tips to Speak English Fluently Fast →These are the five errors learners make most often. Check yourself against each one.
Mistake 1: Using "will" in the result
- Wrong: *If you heat ice, it will melt.*
- Right: *If you heat ice, it melts.*
"Will" is not a crime here, but it changes the meaning. With "will," you are talking about one future case (that is the first conditional). With the present simple, you are saying it is always true.
Mistake 2: Forgetting the -s
- Wrong: *If my brother drink milk, he get sick.*
- Right: *If my brother drinks milk, he gets sick.*
He, she and it need -s in both parts.
Mistake 3: Using a different tense in the "if" part
- Wrong: *If you will press the button, the door opens.*
- Right: *If you press the button, the door opens.*
The "if" part of the zero conditional never takes "will."
Mistake 4: Wrong comma
- Wrong: *The streets flood, if it rains.*
- Right: *If it rains, the streets flood.* or *The streets flood if it rains.*
Comma only when "if" comes first.
Mistake 5: Using it for something that is not always true
- Wrong for most people: *If I go to Paris, I visit the Eiffel Tower.* (Do you go to Paris often?)
- Better: *If I go to Paris next year, I will visit the Eiffel Tower.* (first conditional, one future plan)
Ask yourself: "Does this happen every time?" If yes, zero conditional. If it is one specific future event, use the first conditional.
How is it different from the other conditionals?
You do not need to master all of them today. But seeing them side by side helps you choose fast.
| Type | Formula | Meaning | Example |
|---|---|---|---|
| Zero | If + present, present | Always true | If I drink coffee, I stay awake. |
| First | If + present, will + verb | Real future possibility | If I drink coffee tonight, I won't sleep. |
| Second | If + past, would + verb | Imaginary now or future | If I drank coffee, I wouldn't sleep. (but I don't drink it) |
| Third | If + had + past participle, would have + past participle | Imaginary past | If I had drunk coffee, I wouldn't have slept. |
For daily conversation, the zero and first conditionals do most of the work.
Can I use other words instead of "if"?
Yes. These words also work in the zero conditional:
- When: *When I wake up, I check my phone.* (sounds more certain)
- Whenever: *Whenever it snows, school closes.* (stresses "every single time")
- Every time: *Every time I call him, he's busy.*
- Unless (means "if not"): *I don't eat breakfast unless I'm hungry.*
"Unless" confuses many learners. Change it back to "if not" in your head: *I don't eat breakfast if I'm not hungry.* Same meaning.
How do I practice it so it comes out naturally?
Reading rules is the slow way. Use this five-minute drill once a day for a week:
1. Pick one topic: your morning, your job, your kids, your phone, the weather.
2. Write five sentences about that topic using "if" or "when." Example topic "my job": *If a client calls, I answer within one hour.*
3. Read them out loud twice. Then flip the order of each one: *I answer within one hour if a client calls.*
4. Change the subject: turn *I* into *my boss* and add the -s. *If a client calls, my boss answers within one hour.*
5. Use one sentence in real life today, in a message, an email or a conversation.
After seven days you will have 35 sentences about your own life. Those stick much better than textbook examples, because they are true for you.
Quick self-check
Fix these sentences. Answers are below.
1. If you will mix yellow and blue, you get green.
2. When my dog hear a noise, he bark.
3. Plants die, if they don't get water.
4. If it rains, the game will be canceled every time.
Answers:
1. If you mix yellow and blue, you get green.
2. When my dog hears a noise, he barks.
3. Plants die if they don't get water. (no comma)
4. If it rains, the game is canceled. ("every time" already tells us it is always true, so use the present simple)
Your next step
Write five zero conditional sentences about your own morning routine right now, starting with "When I wake up..." and "If I'm late...". Say them out loud, then use one of them today in a real message. Tomorrow, pick a new topic and repeat. In one week, this structure will come out without you thinking about the grammar.
FAQ
What is the difference between the zero and the first conditional?
The zero conditional is for things that are always true: If I drink coffee late, I stay awake. The first conditional is for one future situation: If I drink coffee tonight, I won't sleep. The first uses will in the result.
Can I use 'when' instead of 'if' in the zero conditional?
Yes. In the zero conditional, if and when mean almost the same thing because the result always happens. When sounds a little more certain, if sounds a little more general.
Do I need a comma in a zero conditional sentence?
Use a comma when the if part comes first: If it rains, the bus is late. Do not use a comma when the result comes first: The bus is late if it rains.