First of all, the lesson Zero was about epenthesis and in the lessons 8-9 we see "Ko laja zhavvors", "Zhavvorsa imesh zhila zhavvors ershe". Should the Accusative form be zhavvors instead of zhavvorse?
Good question. The short answer is ... maybe.
The epenthesis lesson is a bit outdated/simplified. You can find a bit more detailed look on epenthesis at
http://wiki.dothraki.org/Phonotactics#Epenthesis, but even that discussion is mostly phonotactical. How epenthesis actually works is kinda complicated (see eg. my original post at
http://forum.dothraki.org/language-updates/on-a-and-b-classes/) - so much so that it's mostly best learned with the words. The ending consonant cluster
-rs does definitely fit in the coda of a syllable, so in that sense the
-e should not be needed. Our wiki's vocab page offers the accusative as
zhavvors, but I can't find corroborating example in Peterson-created text corpus, so that might be just an educated guess (probably made by me before I even knew any reason to suspect I might be wrong).
This particular situation stems from compound creation, and for that we have a good blog post:
http://www.dothraki.com/2012/02/just-for-fun/. From that we get "If the second noun ends in a vowel (regardless of what noun it used to be), the resultant compound will likely be an inanimate noun of Class B (sometimes it will be Class A)." So I guess the epenthetic
-e is actually likely - even more so since
vorsa is animate and thus the ending
-a is a bit more ...erm... "stem-locked".
Secondly, about the adjectives. There are many examples of present tense, but how to say something like "My son is not strong, but he will be strong"? Rizh anni vos hajo vosma me ahaja? Can we conjugate adjectives like usual verbs?
We tend analyze the situation so that the words
hajo and
ahaja there
are conjugations of a stative verb
hajat; It's not an adjective conjugated like a verb, it's a verb. There can't really be a proper adjective without a corresponding verb, so whether you like to speak of adjectives as separate words or as special way most Dothraki stative verbs can be used is an academic conversation, I feel.
It must be said, though, that the adjective - verb transition can be irregular. This is rare but possible. I might be mistaken about the word, but think the adjective
samva, for example, has the corresponding verb
samvat, not *
samvalat. This is more epenthesis nastiness and knee deep in exeption of an exeption territory.
And to add to that, there are some adjectives that aren't actually proper adjectives but half calcified examples of Dothraki participle. Thus the verb corresponding with
chilay is AFAIK actually
chilat the verb phrase corresponding with
navvirzethay is actually
nem avvirzethat.
edit: I missed Ingsve's reply, so there's some repetition. Sorry.