sich beitreten/nicht beitreten
Irregular conjugation for ther verb "treten" and its compounds: Replacement of -e- in the stem of Present tense with -i- for the second and third person singular form of Present tense and singular form of Imperative , and with -a- for Preterite ("ich trat") and -e- in Past Participle ("getreten").
The verb has several variants of conjugation, which may correspond to different meanings. Please use the menu to select one or all variants.
zu + Infinitiv