Verb Types

Present tense stem = verbal root
Roots ending in ι̭ (consonantal iota) or Ϝ (digamma)
cv-1a[1]	v-1a[1]	5	roots ending in consonantal iota
cv-1a[2]	v-1a[2]	2	roots ending in αι
cv-1a[3]	v-1a[3]	9	roots ending in ει
cv-1a[4]	v-1a[4]	42	roots ending in υ
cv-1a[5]	v-1a[5]	7	roots ending in αυ
cv-1a[6]	v-1a[6]	93	roots ending in ευ (retain υ in the present)
cv-1a[7]	v-1a[7]	17	roots ending in ευ (lose υ in the present)
cv-1a[8]	v-1a[8]	9	roots ending in ου
Roots ending in a stop
cv-1b[1]	v-1b[1]	59	labials (π β φ)
cv-1b[2]	v-1b[2]	119	velars (κ γ χ)
cv-1b[3]	v-1b[3]	29	dentals (τ δ θ)
cv-1b[4]	v-1b[4]	2	stop (adding ε to form the present tense stem)
Roots ending in a liquid/nasal
cv-1c[1]	v-1c[1]	21	ρ
cv-1c[2]	v-1c[2]	48	μ or ν
Roots ending in a vowel
cv-1d[1a]	v-1d[1a]	83	ending in α lengthens before a tense form
cv-1d[1b]	v-1d[1b]	24	ending in α does not lengthen before a tense form
cv-1d[2]	v-1d[2]	1	ε
cv-1d[2a]	v-1d[2a]	305	ending in ε lengthens before a tense form
cv-1d[2b]	v-1d[2b]	25	ending in ε does not lengthen before a tense form
cv-1d[2c]	v-1d[2c]	12	ending in ε loses the ε in the present tense
cv-1d[3]	v-1d[3]	93	ending in ο

Present tense stem = verbal root + ι
Roots ending in δ or γ adds ι̭> ζω
cv-2a[1]	v-2a[1]	241	δ
cv-2a[2]	v-2a[2]	16	γ
Roots ending in a velar (κγχ) adds ι̭ > σσω
cv-2b	v-2b	43
Roots ending in a Ϝ (digamma)
cv-2c	v-2c	3
Roots ending in a liquid (λ ρ) or nasal (μ ν)
cv-2d[1]	v-2d[1]	51	λ
cv-2d[2]	v-2d[2]	9	αρ
cv-2d[3]	v-2d[3]	14	ερ
cv-2d[4]	v-2d[4]	16	αν
cv-2d[5]		6	εν

Present tense stem = verbal root + ν
cv-3a[1]	v-3a[1]	16	Roots ending in a vowel add ν
cv-3a[2a]	v-3a[2a]	4	Roots ending in a consonant add αν (without modifications)
cv-3a[2b]	v-3a[2b]	28	Roots ending in a consonant add αν (with an epenthetic ν)
cv-3b		4	Roots adding νε
cv-3c[1]	v-3c[1]	13	Roots ending in a vowel add (ν)νυ
cv-3c[2]	v-3c[2]	17	Roots ending in a vowel add νυ
cv-3d		16	Roots adding νι (consonantal iota)

Present tense stem = verbal root + τ
cv-4	v-4	46

Present tense stem = verbal root + (ι)σκ
cv-5a	v-5a	27	Roots ending in a vowel adding σκ
cv-5b	v-5b	5	Roots ending in a consonant adding ισκ

Athematic (μι) verbs
cv-6a	v-6a	54	Roots that reduplicate to form their present tense stem
cv-6b	v-6b	26	Roots that do not reduplicate to form their present tense stem

Verbal roots that change their stem vowel
	v-7	12

Verbs using more than one verbal root

The information on this page is taken from The Morphology of Biblical Greek, by W.D. Mounce (1994)

Present tense stem = verbal root