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done in Chapters 5, 6, and 7. The following generaliza-

tions about suffix classes may be made.
4-2.] Phonological and morphological conditioning

All suffixes starting with /:/ vowel length,

/y/, and /11/ require a preceding vowel. All suffixes
starting with /w/ require a preceding vowel except -wa
final suffix which may take either a preceding vowel

or consonant. All suffixes beginning with a vowel
(always /i/) require a preceding consonant, except that
the nominalizing suffix -iri when following vowel length
verbalization in Huancané (see 4-3.22.12) permits a pre-
ceding /a/, the /i/ then becoming the homorganic glide
/y/.

All but three noun suffixes beginning with a
voiced consonant and all but two verbal derivational
suffixes beginning with a voiced consonant always re-
quire a preceding vowel. The three noun suffixes that
do not always require a preceding vowel are -layku ~
-rayku ‘on account of' and -ma ~ -mma (a frozen suffix)
which basically require a preceding vowel but are subject
to the three-vowel rule (see 4-3.22.16), and -na ‘on, in'
which is usually preceded by a vowel but has more complex
morphophonemics in certain dialects.

Verbal derivational suffixes that begin with the
nasal /n/ but may be preceded by either a consonant or a

vowel are -naqa- ‘around, aimlessly’ and -nuga- placer.