Zero Conditional in English
Use the zero conditional for general truths, routines, and results that regularly follow a condition.
Learning Objective
Zero Conditional in English
Form zero-conditional sentences and distinguish regular results from predictions about one future event.
Clear Explanation
The zero conditional links a condition with its usual, automatic, or generally true result. Both clauses commonly use the present simple, and when can often replace if.
Form and Structure
If/When + present simple, present simple
“If water reaches 100°C at sea level, it boils.”
Present forms can have future reference after if, but use the first conditional when the meaning is a real possibility in one particular future situation.
Meaning and Use
General truth
Use the pattern for facts and predictable relationships.
“If plants do not get light, they die.”
Habitual result
The result can describe what regularly happens in a repeated situation.
“If I feel tired, I go for a short walk.”
Clause order
Either clause may come first; use a comma when the if-clause comes first.
“The screen turns off if you press this button.”
Common Errors and Meaning Traps
If you will heat ice, it melts.
If you heat ice, it melts.
Use the present simple in a standard zero-conditional if-clause.
If people don't eat, they will get hungry.
If people don't eat, they get hungry.
Use a present result when stating a general truth.
If I am tired I take a break.
If I am tired, I take a break.
Use a comma after an introductory if-clause.
Guided Practice
Use the grammar in context
“When I work late, I take a taxi home.”
“If the alarm sounds, everyone leaves the building.”
Write one scientific fact, one routine, and one instruction using the zero conditional.
Quick Recap
The zero conditional links a condition with its usual, automatic, or generally true result. Both clauses commonly use the present simple, and when can often replace if.
Use the pattern for facts and predictable relationships.
Present forms can have future reference after if, but use the first conditional when the meaning is a real possibility in one particular future situation.
Use the present simple in a standard zero-conditional if-clause.
Independent Mastery Check
Complete these four checks before taking the quiz. If one feels difficult, return to the matching section and try again.
Explain the core rule in your own words without looking back at the lesson.
Find the target form in “If water reaches 100°C at sea level, it boils.” and explain what it communicates in this context.
Explain why “If you heat ice, it melts.” is the recommended revision for “If you will heat ice, it melts.”.
Write one scientific fact, one routine, and one instruction using the zero conditional.
Related Grammar Lessons
Aim for at least 5 out of 6 in the quiz below. For every missed answer, read the explanation, return to the relevant section, and try the quiz again.
Which statement best explains Zero Conditional in English?
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