Verbs of class B1 lack mu-, e.g. págud ‘get burnt’. Verbs of class
B2 lack mag-, e.g. palanas ‘be eroded’. Verbs of B3 occur with
maka- but have a meaning ‘become [so-and-so]’, e.g. laun ‘age’.
Verbs of class B3(1) occur with maka- in two meanings: (1) become
[so-and-so], and (2) cause to become [so-and-so]. In the latter meaning
it also occurs with makapa- (nakapa-), e.g. lup-ut2 ‘thicken’.
Verbs of class B4 lack na- (ma-). E.g. laúsag ‘got worse and
worse’. Verbs of class B5 lack maka- (naka-) and verbs of class B6
lack magka-2, e.g. paliyar ‘for an engine to malfunction’. Many
verbs in the class B conjugation have one or more of these
conjugational features. E.g. duktur as a verb ‘become a doctor’ is
in class B16,—i.e. it lacks mu- and lacks magka-.
The symbols S and N are used just as with the verbs of the A
conjugation. The symbolization B2S indicates that the penult is short
with the durative affixes (mag-, etc.), e.g. lúya ‘get weak’. A
symbol BN indicates that paN- may be added to the base with the
volitional affix (mu-) and that the root plus mu- (mi-, etc.) does not
differ in meaning from the root plus maN- (naN-).1 An example of a verb
of conjugation BN is pula.