The participle looks exactly like the adjectives ending in –o, that you’ve learned in this lesson.
In the masculine gender singular they end in –O. In all the other forms, this –O is transformed to an –L followed by the usual endings.
Here are two tables to compare the past tense participle and the adjectives ending in –o.
And here’s a tongue-twisting exercise:
Other adjectives following this pattern:
zao, zla, zlo evil
mio, mila, milo dear
ceo, cela, celo whole
kiseo, kisela, kiselo sour
veseo, vesela, veselo jolly
debeo, debela, debelo fat
topao, topla, toplo warm
vreo, vrela, vrelo hot