Zero Conditional Error Correction

It is wrong because standard zero conditional does not use "will" after "if." When the sentence describes a general truth or a repeated result, the if-clause stays in the present simple: "If you mix oil and water, they separate." Many learners see "if" and automatically reach for a future form, but that is the pattern for future possibilities, not for always-true results. A quick check is to ask: does this happen every time? If the answer is yes, keep both clauses in the present simple.

If the sentence means a general truth, the result clause should not use "will." Zero conditional keeps both sides in the present simple: "If plants don't get light, they don't grow well." The future form changes the meaning and pushes the sentence toward first conditional, which is used for a specific future possibility. This is one of the most common zero conditional mistakes because learners often think every result clause needs a future verb. In fact, zero conditional is about regular cause and effect, not prediction.

Start with meaning, not form. If the sentence describes something general, repeated, scientific, or always true, use zero conditional: present simple in both clauses. If it describes a real future possibility, use first conditional: present simple after "if" and "will" in the result clause. A fast test is swapping "if" for "when." If the sentence still sounds natural and keeps the same meaning, it is probably zero conditional. If "when" sounds too definite, you probably need first conditional instead.