"Um" verbs are those that do not necessarily have an object associated with them. Some examples of "um" verbs would be:
- Hånao = to go
- Såga = to stay
- Kånta = to sing
- Li'of = to dive
- Ñangu = to swim
- O'mak = to shower
- Chocho = to eat
When the sentence has no direct object and a singular subject, you simply add the infix -um- before the first vowel of the verb, and follow the verb with a yo' type pronoun. If the subject is plural, you add the prefix man- before the root verb, and follow it with a yo' type pronoun.
Note: Sorry to throw an extra concept in here, but simply adding the -um- or man- to the verb usually connotes a completed or past action, to produce a progressive action the penultimate (2nd to last) syllable is duplicated.
Here are some examples:
- Humånao yo' para i tenda. = I went to the store.
- Sumåsåga gue' giya Ye'ña. = She's staying/lives in Yona.
- Mangånta siha. = They sang.
- Lumili'of hao gi ladera. = You (singular) were diving from the cliff.
- Manñangu hamyo gi painge. = You (plural) swam last night.
- Umo'mak yo' esta. = I showered already.
- Mañochocho hit. = We are eating.
Here's the complicated part... When the sentence has a direct object we consider two cases: definite object and indefinite object. When the object is definite you don't have to add anything to the verb. These sentences use a hu type pronoun, followed by the verb then the article and object. Luckily these types of sentences are rare, and some of them sound contrived even. E.g.:
- Hu kånta i kanta. = I sang the song.
- Chumocho yo' pån. = I ate some bread.