It seems that
this is a fairly simple inflected language, at least so far as we can tell from the given sentences. Inflections come after the stem but "stack".
Verbs have a stem ending in h, after which there is a tense marker (d for present, t for past), a connecting i, and an ending which in the given examples is one of the following:
-osh (first person singular)
-ash (second person)
-esh (third person singular)
-ezh (third person plural)
I think (though the evidence is a bit thin) that -o/-a/-e indicates person and -sh/-zh indicates number. (In earlier versions of this answer, I thought that progressive aspect was sometimes marked by a change in inflection, but I have abandoned that idea.)
Nouns have a stem ending in a consonant, after which there is a case marker (atta for the subject, ebbe for the object; these sentences don't include indirect objects, prepositions, etc.), then a connecting xko, then a number marker (f for singular, v for plural).
Pronouns appear not to be used, at least in the simple sentences here.
The only other word we see is naner meaning "but". It's probably invariant.
Word order generally seems to be SVO.
Articles appear not to be used.
The verb "to be" takes an object, not a complement.
The spelling error:
I think the -azh in example 3 should be an -osh. It's hard to be certain, but I suspect that in fact -sh is for singular and -zh for plural, so "we" would be -ozh, all the "you"s here are singular, and "you (pl)" would be -azh.
The sentences we were asked to translate:
Kielokattaxkov ohtiezh chwtwobebbexkov.
kielok is "earthling", atta is subject, ov is plural.
oh is "to be", t is past, ezh is third person plural.
chwtwob is "being", ebbe is object, ov is plural.
The earthlings were (the) beings.
Ohdiash rachatebbexkof.
oh is "to be", d is present, ash is second person.
rachat is "dinner", ebbe is object, of is singular.
You are dinner. Uh-oh.
Kielokattaxkov ohdiezh daxorpebbexkov.
kielok is "earthling", atta is subject, ov is plural.
oh is "to be", d is present, ezh is third person plural.
daxorp is "food", ebbe is object, ov is plural.
The earthlings are food-items. Uh-oh, again.