On grammatical class:

di'i
tense interval modifier: regularly; subjective tense/modal; defaults as time tense.
na'o
tense interval modifier: characteristically/typically; tense/modal; defaults as time tense.
ru'i
tense interval modifier: continuously; subjective tense/modal; defaults as time tense.
ta'e
tense interval modifier: habitually; subjective tense/modal; defaults as time tense.
dei'a
tense interval modifier: decreasingly...; decrementative. Tagged sumti, if present, indicates amount of decrease (lo te jdika)
ze'ai
tense interval modifier: increasingly...; incrementative. Tagged sumti, if present, indicates amount of increase (lo te zenba)
zei'a
tense interval modifier: increasingly...; incrementative. Tagged sumti, if present, indicates amount of increase (lo te zenba)
di'inai
tense interval modifier: irregularly/aperiodically; tense/modal; defaults as time tense.
na'onai
tense interval modifier: atypically; subjective tense/modal; defaults as time tense.
ru'inai
tense interval modifier: occasional/intermittent/discontinuous; defaults as time tense.
ta'enai
tense interval modifier: non-habitually; subjective tense/modal; defaults as time tense.

In definition:

cmavrta'e
x1 is the selma'o "TAhE".

In notes:

ta'erda
x1 is a part of Lojban text representing rule 'interval-property' according to the first edition of the book 'The Complete Lojban Language'.