Based on the corpus data of SYN2015, the paper explores the formal variety of processual adjectives derived from the verbs of the type "sází". Considering the existence of the doublet -ejí/-í (3rd person, plural, indicative, present, active) - codified in stages during the 20th century in Standard Czech - it aims to verify whether this formal variety can be attested also in the case of adjectives (-ející/-ící).
The results indicate major differences between the verbs with doublets codified in 1902, 1941 and 1957 on one hand and the rest of the type, where the doublets were codified uniformly in 1993, on the other.