I changed Shonkasika’s progressive form from a periphrasis (an adverbial participle + a be-verb) to a synthetic form. Unlike the other verb inflections, which are suffixes, this one is a prefix: je- before consonants and jey- before vowels. This prefix can occur alongside just about any tense-aspect-mood form, although it is most common with the present, past, and perfect indicative.
lahut, jelahut I greet, I am greeting
lahutu, jelahutu I greeted, I was greeting
lahwipet, jelahwipet I have greet, I have been greeting