What are the three types of conditional statement in English?

What are the three types of conditional statement in English?
Conditional

Conditional sentence type
Usage
If clause verb tense

Zero
General truths
Simple present

Type 1
A possible condition and its probable result
Simple present

Type 2
A hypothetical condition and its probable result
Simple past

Type 3
An unreal past condition and its probable result in the past
Past perfect

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Conditional
Conditional sentence type Usage If clause verb tense
Zero General truths Simple present
Type 1 A possible condition and its probable result Simple present
Type 2 A hypothetical condition and its probable result Simple past
Type 3 An unreal past condition and its probable result in the past Past perfect

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