Where it appears in the exam
What is it?
The zero conditional describes results that ALWAYS occur when the condition is met: natural laws, institutional rules, habitual personal truths. The structure is If + present simple, present simple — no 'will', no 'would', no future. At B2 level, the challenge isn't forming the structure (it's the simplest conditional), but RECOGNISING when to use it instead of the first conditional.
Why it matters in the exam
Cambridge exploits the zero/first boundary in Part 4 (Key Word Transformation): you're given 'every time / whenever / always' and must transform with 'if' + present. If you write 'will', you lose the 2 points. In Part 1, it appears as a distractor — options with 'will' alongside correct present tense options. In Writing, zero conditional strengthens arguments with authority: 'If students practise regularly, their scores improve' sounds more authoritative than 'their scores will improve'.
The cognitive trap
"The instinct: adding 'will' to every 'if' sentence — 'If you press this button, the machine will start'"
Why your brain does this: in most languages, there is no formal grammatical distinction between a general truth and a future prediction. Both feel like 'future' scenarios. Your brain sees 'if' and automatically activates the future marker.
"If you heat water, it boils." (zero) ≠ "If it rains tomorrow, I will stay home." (first)
Why it matters in the exam: in English, the difference is 'will'. If the result is automatic (always happens), there is no 'will'. If the result is a prediction about a specific situation, you need 'will'. Your brain must learn this distinction — it doesn't come naturally from other languages.
Recognition pattern
In the exam, look for the key signal first. The answer follows.
Recognition signals in the text
"Every time I drink coffee late, I can't sleep." → "If I drink coffee late, I can't sleep."
"The alarm always goes off if someone opens the door."
"If you mix red and blue, you get purple."
"If employees arrive late, they lose their bonus."
"If the temperature ___ below zero, the pipes freeze." → 'drops'
"Unless you water plants regularly, they die." = "If you don't water plants..."
The errors Cambridge exploits
"If you press this button, the machine will start."
Your brain adds 'will' because it thinks about the future: 'someone is going to press'. But the sentence describes a permanent mechanism — not a prediction. No will.
"If you press this button, the machine starts."
General truth (always happens) — zero conditional. Present in both clauses.
"If water reaches 100°C, it will boil."
It sounds logical — 'it's going to boil'. But natural laws don't need prediction. Cambridge marks 'will' as an error here.
"If water reaches 100°C, it boils."
Physical law — zero conditional. The result is automatic, doesn't depend on circumstances.
"Unless there is strong evidence, the court will dismiss the case."
The key: is this a procedure that is ALWAYS followed (zero) or a specific future case (first)? If it's a general rule — no will.
"Unless there is strong evidence, the court dismisses the case."
Habitual legal procedure — zero conditional. 'Unless' = 'if not'. Present + present.
"Whenever I eat seafood, I will feel sick."
'Will' turns the habit into a prediction. 'Whenever' already signals repetition — you don't need future for something that always happens.
"Whenever I eat seafood, I feel sick."
'Whenever' = every time. A constant personal pattern — equivalent to zero conditional.
Why your brain gets it wrong
The learner's short circuit
Analyse the trap by exam format
Every time you exercise regularly, your energy levels increase. Your energy levels increase ______ regularly. (IF)
Your brain sees 'if' and activates conditional mode. Conditional = future = will. But 'every time' indicates a constant pattern — the zero conditional doesn't use will in either clause.
Every time
'Every time' = recurring pattern. When you transform to 'if', you keep present + present. No will.
→ if you exercise
The word 'if' doesn't automatically mean 'will'
'If' is not a synonym for future. Cambridge counts on your brain making that association. 'Every time' and 'whenever' are the key signals for zero conditional.
Strategy
Before writing: does the original sentence have 'every time', 'whenever', 'always'? If yes, the transformation with 'if' keeps present simple in BOTH clauses.
If you don't wear sunscreen, your skin burns easily. Your skin burns easily ______ sunscreen. (UNLESS)
Double trap: 'unless' already contains the negation (= if not), so you don't need 'don't'. And since it's a general truth (your skin always burns), it keeps present simple — no will.
your skin burns easily
'Unless' = 'if not'. Your skin burning in the sun = general truth. Zero conditional: present + present.
→ unless you wear
'Unless' removes the negation AND keeps the present
Cambridge asks for two simultaneous operations: convert 'if not' to 'unless' AND maintain zero conditional tense agreement. Many learners add 'will' by inertia.
Strategy
With 'unless': (1) remove the negation, (2) ask yourself if it's a general truth — if yes, present + present.
According to the company's policy, if an employee 8 to submit the report on time, the manager issues a formal warning.
Your brain sees 'if' + workplace situation and thinks: this is going to happen in the future — 'will fail'. Or interprets the sentence as hypothetical — 'would fail' / 'failed'. But 'company's policy' = institutional rule that always applies. Zero conditional: present simple.
Rules and policies are zero conditional
Cambridge signals the institutional context: 'company's policy', 'according to the rules', 'school regulations'. If the result is automatic by regulation, it's zero — not first.
Strategy
Look for signals of permanence: 'policy', 'rule', 'regulation', 'always', 'procedure'. If the result doesn't depend on future circumstances but on a fixed norm — present + present.
Zero Conditional (General Truths) is 1 of 82
The exam tests 82 grammar competencies across 19 families. Mastering one is the first step. Automating all 82 is passing.
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