901. The present participle stem is formed by adding #-nt-# or #-nti-#,
nominative #-ns#, to the present stem: as,
#dāns#, _giving_, stems #dant-#, #danti-#; #regēns#, #capiēns#;
#laudāns#, #monēns#, #audiēns#.
902. The adjective #sontem# (accusative, no nominative), which was
originally the participle of #sum#, has #o# before the suffix, and
#absēns# and #praesēns# have #e#; the participle of #eō# has #ē# in the
nominative singular, otherwise #u#, #iēns#, #euntis#, &c. #n# rarely
drops before #-s# (63): as, LIBES (inscr.), #exsultās# (Enn.), #animās#
(Lucr.).
903. Some adjectives which were originally present participles have no
verb: as, #clēmēns#, _merciful_, #ēlegāns#, _choice_, #ēvidēns#,
_clear_, #frequēns#, _thick_, #petulāns#, _wanton_, #recēns#, _fresh_,
#repēns#, _sudden_, &c., &c. For #potēns#, _powerful_, see 922.