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Conditionals
The Zero Conditional expresses general truths, scientific facts, and automatic consequences — things that are always true when a certain condition is met. Both clauses use Present Simple.
Structure
If / When + present simple, present simple
Example
If you heat water to 100°C, it boils. | When demand exceeds supply, prices rise.
When water will freeze, it expands.
When water freezes, it expands.
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