B1 · Intermediate Chapter 14

Talking About Facts and Constant Truths

5 Total Rules
60 examples
6 min
Rules in This Chapter Quick Practice

Chapter in 30 Seconds

Master the art of stating facts and universal truths with confidence.

  • Use the zero conditional to describe natural laws.
  • Explain daily routines and personal habits clearly.
  • Distinguish between certainty and future possibilities.
Speak with the certainty of truth.

What You'll Learn

Ready to talk about the world in a super clear way? This chapter will show you how to confidently share general truths and everyday habits. You'll master when to use 'if' versus 'when' for these constant facts, making your English even more precise.

Learning Objectives

By the end of this chapter, you will be able to:

  1. 1
    By the end you will be able to: Formulate sentences describing scientific facts using the zero conditional.

Chapter Guide

Overview

Ready to elevate your B1 English grammar and speak with more precision about the world around you? This chapter is your go-to guide for English talking about facts and constant truths. As you navigate everyday situations and travel, you'll often need to explain how things work, describe routines, or state universal laws. Mastering this skill isn't just about sounding correct; it's about communicating clearly and confidently.
We'll dive into the versatile Zero Conditional, a powerful structure that helps you articulate things that are always, undeniably true. You'll learn how to express everything from scientific facts to your daily habits and even simple instructions. A key focus will be understanding the subtle but important difference between using 'if' and 'when' within these constant truths, allowing you to choose the most precise word. We'll also briefly touch on how the Zero Conditional differs from the First Conditional, ensuring you can distinguish between absolute certainties and likely future possibilities. By the end, you'll be able to discuss general truths and everyday patterns like a pro!

How This Grammar Works

At its heart, the grammar for talking about facts and constant truths revolves around the Zero Conditional. This structure is used when a certain condition always leads to the same, guaranteed result. Think of it like a universal law or an unbroken chain of cause and effect. The most important rule to remember is that you use the Present Simple tense in *both* parts of the sentence.
Let's look at how it applies to different situations:
First, for General Truths, it's about scientific facts or universal observations. For example, "If you heat ice, it melts." Or, "Water boils if you heat it to 100 degrees Celsius." Here, the condition (heating ice/water) *always* results in the same outcome (melting/boiling).
Next, for Habits and Routines, the Zero Conditional describes things that are always true for a person or group. You might say, "When I wake up early, I always feel tired." Or, "If my dog hears the doorbell, she barks loudly." Notice how 'when' can often be used interchangeably with 'if' in these scenarios, especially when describing regular occurrences or routines.
It's also excellent for giving Facts and Instructions. If you're explaining how something works or giving directions, this is your go-to. "If you press this button, the machine starts." Or, "The printer runs out of ink quickly if you print many photos." The action always leads to the stated result.
Finally, let's clarify If vs When and the Zero vs First Conditional. In the Zero Conditional, 'if' and 'when' are often interchangeable for general truths, as both suggest a guaranteed outcome. "If it rains, the grass gets wet" means the same as "When it rains, the grass gets wet." However, the key distinction is between the Zero Conditional and the First Conditional. The Zero Conditional is for things that *always* happen (e.g., "If you mix blue and yellow, you get green"). The First Conditional is for specific future possibilities that are likely to happen (e.g., "If it rains tomorrow, we will stay inside"). Knowing this difference is crucial for precise communication in B1 English grammar.

Common Mistakes

It's easy to make a few common errors when you're first learning to talk about facts and constant truths. Here are some to watch out for:
  1. 1Mixing tenses in the Zero Conditional
* ✗ If you will heat water, it boils.
* ✓ If you heat water, it boils.
* *Explanation:* Both clauses in the Zero Conditional must use the Present Simple tense because we're talking about something that is *always* true, not a future possibility.
  1. 1Using Zero Conditional for a specific future possibility
* ✗ If it rains tomorrow, we stay inside.
* ✓ If it rains tomorrow, we will stay inside.
* *Explanation:* The Zero Conditional is for universal truths and habits. For a specific event that is likely to happen in the future, you need the First Conditional (Present Simple + will + base verb).
  1. 1Overusing 'if' when 'when' implies stronger certainty or routine
* ✗ If the alarm clock rings, I get up. (Grammatically fine, but 'when' is often more natural for routines)
* ✓ When the alarm clock rings, I get up.
* *Explanation:* While 'if' is correct, 'when' often feels more natural and emphasizes the regularity or expected occurrence of the condition for habits and routines.

Real Conversations

Here are a few quick dialogues showing how these grammar patterns appear in everyday B1 English conversations:

A

A

How do you manage to stay so calm under pressure?
B

B

Oh, that's easy! If I feel stressed, I always take a few deep breaths. It really helps.
A

A

I'm trying to grow tomatoes, but they keep dying. Any tips?
B

B

Hmm, well, if the soil is too dry, they don't grow well. And when the sun gets too hot, you need to water them twice a day.
A

A

This coffee machine is confusing! How do I make a latte?
B

B

No problem! First, if you fill the water tank, the machine lights up. Then, when the milk is hot, you add the espresso.

Quick FAQ

Q

What's the main difference between "if" and "when" in the Zero Conditional?

In the Zero Conditional, "if" and "when" are often interchangeable for general truths and facts. However, "when" often emphasizes that the condition is expected or happens regularly (like a routine), while "if" can introduce a condition that *might* occur but still leads to a guaranteed result. Both express certainty.

Q

Can I use the Zero Conditional to give instructions?

Absolutely! It's perfect for clear instructions. For example, "If you want to print, you click this icon," or "The printer starts if you press the green button." It makes the result of an action very clear and predictable.

Q

How does knowing the Zero Conditional help my B1 English?

It significantly improves your ability to explain how things work, describe universal laws, talk about your habits, and give precise instructions. These are all common and essential communication tasks in B1 English for discussing facts and constant truths.

Q

Is the Zero Conditional only for scientific facts?

Not at all! While it's great for scientific facts ("If you freeze water, it turns to ice"), it's also widely used for everyday habits ("If I don't eat breakfast, I get hungry fast"), general observations ("When people are tired, they often make mistakes"), and practical instructions.

Cultural Context

Native English speakers use the Zero Conditional constantly in daily conversation. It's a fundamental way to express how the world works, share personal routines, and give straightforward explanations. Because it deals with objective facts and established patterns, its use is generally very direct and doesn't vary much between formal and informal settings. Whether you're reading a scientific article or chatting with a friend about their morning routine, the structure remains consistent. This predictability makes it a solid and reliable part of your B1 English grammar toolkit.

Key Examples (8)

1

If you heat water to 100°C, it boils.

Zero Conditional: General Truths
2

When I'm hungry, I eat something.

Zero Conditional: General Truths
3

If I drink coffee too late, I can't sleep.

Zero Conditional: Habits and Routines
4

When she finishes work, she usually watches a sitcom.

Zero Conditional: Habits and Routines
5

If you press `Ctrl + S`, the document saves.

Zero Conditional: Facts and Instructions
6

When you don't get enough sleep, you feel tired.

Zero Conditional: Facts and Instructions
7

If you heat water to 100 degrees Celsius, it boils.

Zero Conditional: General Truths (If vs When)
8

When the sun goes down, it gets dark.

Zero Conditional: General Truths (If vs When)

Tips & Tricks (4)

💡

The 'When' Test

If you can replace 'If' with 'When' and the sentence still makes perfect sense, you probably need the Zero Conditional.
frontend.learn_grammar.from_rule: Zero Conditional: General Truths
💡

The 'Always' Test

If you can add the word 'always' to the result clause and it still makes sense, you should probably use the Zero Conditional.
frontend.learn_grammar.from_rule: Zero Conditional: Habits and Routines
💡

The 'Whenever' Test

If you can replace 'if' with 'whenever' and the sentence still makes sense, it's a Zero Conditional. 'Whenever you heat ice, it melts.'
frontend.learn_grammar.from_rule: Zero Conditional: Facts and Instructions
💡

The 'Always' Test

If you can add the word 'always' to the sentence and it still makes sense, use the Zero Conditional. 'If it rains, the grass (always) gets wet.'
frontend.learn_grammar.from_rule: Zero Conditional: General Truths (If vs When)

Key Vocabulary (5)

condition a state or requirement inevitable certain to happen routine a sequence of actions regularly followed instruction detailed information telling how to do something possibility a thing that may happen

Real-World Preview

thermometer

Explaining a natural phenomenon

Review Summary

  • If + Present Simple, Present Simple
  • If + Present Simple, Present Simple
  • If + Present Simple, Imperative
  • If/When + Present Simple, Present Simple
  • Zero (Fact) vs First (Possibility)

Common Mistakes

Do not use 'will' in the 'if' clause of a zero conditional. Keep both parts in the present simple.

Wrong: If I will go to the park, I feel happy.
Correct: If I go to the park, I feel happy.

When giving instructions, use the imperative form (verb base), not the gerund.

Wrong: If you are cold, putting on a coat.
Correct: If you are cold, put on a coat.

This refers to a specific future event, so the first conditional is required.

Wrong: If it rains tomorrow, the grass is wet.
Correct: If it rains tomorrow, the grass will be wet.

Next Steps

You have mastered the language of truth. Keep practicing!

Write 5 facts about your favorite hobby.

Continue to: Planning for Real Future Possibilities

Quick Practice (10)

Complete the sentence with the correct form of the verb in parentheses.

If you ___ (mix) red and white, you ___ (get) pink.

✓ Correct! ✗ Not quite. Correct answer: mix / get
Both verbs must be in the Present Simple for a general truth.

frontend.learn_grammar.from_rule: Zero Conditional: Habits and Routines

Find the error in this sentence: 'When I am tired, I will go to bed early.'

Find and fix the mistake:

Correct the sentence:

✓ Correct! ✗ Not quite. Correct answer: a
For a general habit, remove 'will' and use the Present Simple.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths (If vs When)

Choose the most natural word to complete the sentence.

___ I am late for work, my boss gets very angry.

✓ Correct! ✗ Not quite. Correct answer: If
'If' sets the condition for the boss's anger.

frontend.learn_grammar.from_rule: Zero Conditional: Habits and Routines

Complete the sentence with the correct form of the verb in parentheses.

If you ___ (mix) red and white, you ___ (get) pink.

✓ Correct! ✗ Not quite. Correct answer: a
Zero conditional uses Present Simple in both clauses for general truths.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths (If vs When)

Which sentence is a correct Zero Conditional?

Choose the correct option:

✓ Correct! ✗ Not quite. Correct answer: If it rains, the grass gets wet.
Zero Conditional uses Present Simple in both clauses for general truths.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths

Which sentence is a correct Zero Conditional?

Choose the best option:

✓ Correct! ✗ Not quite. Correct answer: b
Option B correctly uses Present Simple in both clauses for a general fact.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths (If vs When)

Choose the correct form for a general fact.

If you ___ ice, it melts.

✓ Correct! ✗ Not quite. Correct answer: heat
This is a Zero Conditional fact, so we use the Present Simple.

frontend.learn_grammar.from_rule: Zero vs First Conditional: Key Difference

Find the mistake in the sentence.

Find and fix the mistake:

If she drink coffee at night, she doesn't sleep well.

✓ Correct! ✗ Not quite. Correct answer: drink -> drinks
The subject 'she' requires the third-person singular 'drinks'.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths

Which sentence is a Zero Conditional?

Select the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: b
Sentence B describes a general fact using Present Simple in both clauses.

frontend.learn_grammar.from_rule: Zero Conditional: Facts and Instructions

Complete the sentence with the correct form of the verb in parentheses.

If you ___ (freeze) water, it ___ (become) solid.

✓ Correct! ✗ Not quite. Correct answer: freeze, becomes
Both verbs must be in the Present Simple for a scientific fact.

frontend.learn_grammar.from_rule: Zero Conditional: General Truths

Score: /10

Common Questions (6)

Yes! In the Zero Conditional, they mean almost the same thing. 'When' suggests the condition happens regularly.
Generally, no. If you use will, it becomes a First Conditional, which is for a specific future event, not a general truth.
Yes! In the Zero Conditional, when and if are usually interchangeable because the result is a certainty. 'When it rains, I stay home' is just as correct as 'If it rains, I stay home.'
It's called 'Zero' because there is zero doubt about the result. It describes a 100% certain cause-and-effect relationship.
No. If you use will, it becomes a First Conditional, which is for specific future events, not general truths.
They are mostly interchangeable. When suggests the condition happens more frequently or certainly than if.
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