* Third Class (or Future) Condition
* Fourth Class Condition
Any condition sentence consists of two parts. The first part is called the '''protasis''' and is the condition - in English it begins with "'''if'''". The second part is called the '''apodosis''' - in English it begins with "'''then'''".
===First Class Condition===
First class conditions are formed by
* Protasis - ει + indicative
* Apodosis - anything
The protasis in first class conditions is negated by [[ου]], as would be expected for the indicative mood.
===Second Class Condition===
Second class conditions are formed by
* Protasis - ει + indicative
* Apodosis - αν + anything
The protasis in first class conditions is negated by [[μη]], rather than the expected [[ου]].
===Third Class (or Future) Condition===
Third class conditions are formed by
* Protasis - εαν + subjunctive
* Apodosis - anything
===Fourth Class Condition===