Paradigm D: Tense Operators

Elements:
pa(past) / before / then
na(present) / at / in / now
fa(future) / after / afterwards
-ziof moments/short intervals
-zaof medium length intervals
-zuof long length intervals
-i-an infix meaning continuity
-u-an infix meaning habitualness
Forms: Tense operators may be (1) simple, (2) continous (with an infixed -i-, (3) habitual (with an infixed -u-, (4) compound; and any of these may me (5) quantified with any of the affixes zi, za, or zu. Any form may occur in any context.
Contexts: There are 3 contexts: (i) before predicates, where they function as verbal inflections of that predicate; (ii) before arguments, where they function as prepositions (with concrete arguments) or conjuctions (with abstract ones); and (iii) in any other position where they function as adverbial modifiers of the sentence as a whole, or suitably punctuated, of the elements they follow.
Null-Form: Standing outside this system is the word ga which preserves the timelessness of the unadorned predicate in contexts in which the predicate would otherwise be absorbed by a preceding description: Le mrenu ga penso = ‘The man is a thinker’ vs. Le mrenu penso = ‘The man-type of thinker’.
Inflection Preposition or Conjunction Adverbial Modifier
3 Simple Tenses:
pa …-ed / was … / was a … before … then / formerly
na …-s / is a … at / during / when … now / currently
fa will … / will be …-ing / will be a … after … afterwards
3 Continous Tenses:
pia was …-ing/ was being …/ was being a … until until now
nia is now …-ing / is now being … / is now being a … while … meanwhile
fia will be … / will be …-ing since … ever since
3 Habitual Tenses:
pua …-ed / was … / was a … (habitually) before … (habitually) then / formerly (habitually)
nua …-s / is a … (habitually) at / during / when … (habitually) now / currently (habitually)
fua will be … / will be …-ing (habitually) since … (habitually) ever since (habitually)
9 Compound Tenses: (here translated only as infections)
papahad (past perfect) panawas then … pafawas going to …
napahas (present perfect) nanais just now … nafais now going to …
fapawill have (future perfect) fanawill then be … fafawill be going to …
A large number of Quantified Tenses:
pazijust now faziimmediately piazicontinously and briefly before now
pazarecently fazasoon piazacontinously for a short time before now
pazulong ago fazueventually piazucontinously for a long time before
etc etc etc
Note: Tense Operators, Causal Operators, and Location Operators can be combined in arbitary ways navi = ‘here-now’; vakou = ‘there-causing’; etc. Also, such forms such as pacenoina = ‘once-but-not-now’; vicava = ‘here-or-there’; etc., may be used. And, quantified forms may be formed by prefixing a Quantifier before a Tense Operator, Causal Operator, or Location Operator: nina = ‘never’; nepa = ‘once (in the past)’; rava = ‘everywhere’; etc. Also, zi, za, and zu may be used as a prefixes, where they denote the length of the event: zipazu = ‘long ago, for a short time’.