Both ”s” & ”ts” are /ʃ/ and /tʃ/ respectively, unless immediately preceded or followed by one another, then ”s” is always /s/ and ”ts” is always /tʃ/.
Past Prefix | Agent Agreement Marker | Aspect Prefix | {Tense Stem} | Modal Suffix | Patient Agreement Marker |
quoting Morrígan, Countess:Basically, just a template of where morphemes go in the verb complex, like
Past Prefix Agent Agreement Marker Aspect Prefix {Tense Stem} Modal Suffix Patient Agreement Marker
It's kind of good way to get an overview of what things might be marked on the verb. Obviously, it's more helpful for language which are polysynthetic, where there are a dozen morphemes that can go into a verb.