The infinitive

The six infinitives

The infinitives fall in six different categories, according to tense and mood. The citation form of a verb is always the present tense active infinitive.

The six infinitives are formed as follows:

		verb voice
		active	passive	Zustandspassiv
tense	present	verb stem + en	past participle (Partizip II) + werden	past participle (Partizip II) + sein
tense	present perfect	past participle (Partizip II) + haben / sein *	past participle (Partizip II) + worden sein	past participle (Partizip II) + gewesen sein

* The use of haben or sein depends on which of the two auxiliary verbs is used in the formation of the present perfect tense.

The following tables present all the infinitives of verbs vorbereiten and bleiben. Bleiben does not have any passive forms.

Example 1		verb voice
Example 1		active	passive	Zustandspassiv
tense	present	vorbereiten	vorbereitet werden	vorbereitet sein
tense	present perfect	vorbereitet haben	vorbereitet worden sein	vorbereitet gewesen sein

Verbs that form the present perfect and the past perfect with sein, also form the perfect infinitive with sein.

Example 2		verb voice
Example 2		active
tense	present	bleiben
tense	present perfect	geblieben sein