Model: denken
Auxiliary: haben
Other forms: bedenken/sich bedenken
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
Futur I
Perfekt
Plusquamperfekt
Futur II