Model: denken
Auxiliary: haben
Other forms: andenken/nicht andenken
Irregular conjugation for ther verb "denken" and its compounds: there is a change of the stem vowel in the stem of Present tense ("ich denke") and the stem of Preterite ("ich dachte") and the stem of Past Participle ("gedacht").
Präsens
Präteritum
Perfekt
Plusquamperfekt
Futur II
Futur I