BBG Chapter 20 — Verbal Roots (Patterns 2–4)¶
Files¶
Exercises¶
| Exercise | Description |
|---|---|
| exercises/ch20-stem-change-drill/ | Stem Change Drill — 20 items: identify root, pattern type, give future form |
Flashcards¶
| File | Description |
|---|---|
| ch20-vocab-deck.md | Human-readable card list — 16 vocabulary words |
| ch20-vocab-deck.txt | Anki import file (File → Import) |
| ch20-vocab-deck-fd.txt | Flashcards Deluxe import file |
Basics of Biblical Greek Grammar, Mounce, 4th Edition
1. Why Greek Verbs Look Different Across Tenses¶
Greek verbs are built on a verbal root — an underlying consonant skeleton — but the surface form you see in a given tense can look quite different. Three processes account for most variation:
- Ablaut (vowel gradation) — the root vowel changes between tenses
- Consonant assimilation — stop consonants change when σ is added
- Suppletion — completely different stems are used for different tenses (as in English go/went)
The BBH grammar introduces these under Patterns 2, 3, and 4. Pattern 1 is the regular λύω paradigm already mastered.
2. Pattern 2 — Stop Consonant + σ Combinations¶
When a verbal stem ends in a stop consonant (π, β, φ, κ, γ, χ, τ, δ, θ), adding the σ tense formant creates a predictable double consonant. This affects the future, first aorist, and perfect active.
2.1 Labial Stops (π, β, φ) + σ → ψ¶
| Present | Stem | Future | Aorist |
|---|---|---|---|
| γράφω | γραφ- | γράψω | ἔγραψα |
| βλέπω | βλεπ- | βλέψω | ἔβλεψα |
| πέμπω | πεμπ- | πέμψω | ἔπεμψα |
| λείπω | λειπ- | λείψω | ἔλιπον (2nd aor.) |
Diagnostic: ψ in a verb form = labial stem + σ. Work backwards: ψ → π/β/φ + σ.
2.2 Velar Stops (κ, γ, χ) + σ → ξ¶
| Present | Stem | Future | Aorist |
|---|---|---|---|
| ἄγω | ἀγ- | ἄξω | ἤγαγον (2nd aor.) |
| ἄρχω | ἀρχ- | ἄρξω | ἦρξα |
| διώκω | διωκ- | διώξω | ἐδίωξα |
| κηρύσσω | κηρυκ- | κηρύξω | ἐκήρυξα |
Diagnostic: ξ in a verb form = velar stem + σ. Work backwards: ξ → κ/γ/χ + σ.
2.3 Dental Stops (τ, δ, θ) + σ → σ (dental drops)¶
| Present | Stem | Future | Aorist |
|---|---|---|---|
| πείθω | πειθ- | πείσω | ἔπεισα |
| σῴζω | σῳδ- | σώσω | ἔσωσα |
| βαπτίζω | βαπτιδ- | βαπτίσω | ἐβάπτισα |
Diagnostic: When a dental precedes σ, the dental simply drops, leaving only σ. The resulting form looks like any other σ-formant future or aorist.
3. Pattern 3 — Vowel Lengthening / Ablaut¶
Some verbs show a different vowel in certain tense stems. The present stem vowel and the future/aorist stem vowel are related by ablaut (Indo-European vowel gradation):
| Ablaut Pattern | Present Vowel | Future/Aorist Vowel | Example |
|---|---|---|---|
| ε/ο gradation | ε | ο (zero grade: nothing) | λέγω → εἶπον |
| ι lengthening | ι | ει | κρίνω → κρινῶ |
| Lengthening | short vowel | long vowel | φιλέω → φιλήσω |
Common verbs with notable ablaut:
| Present | Future | Aorist | Root |
|---|---|---|---|
| λαμβάνω | λήμψομαι | ἔλαβον | λαβ- |
| μανθάνω | — | ἔμαθον | μαθ- |
| τυγχάνω | τεύξομαι | ἔτυχον | τυχ- |
| λανθάνω | λήσω | ἔλαθον | λαθ- |
Note: The present stem often has a nasal infix (ν or αν/αν) inserted into the root that does not appear in other tenses. λαμβάνω (present) → ἔλαβον (aorist): the nasal αν in the present is a present-stem morpheme only.
4. Pattern 4 — Suppletive (Completely Different) Stems¶
Some high-frequency Greek verbs use entirely different roots for different principal parts. These are suppletive verbs and must be memorized individually.
| Present | Future | Aorist Active | Meaning |
|---|---|---|---|
| ὁράω | ὄψομαι | εἶδον | I see |
| ἔρχομαι | ἐλεύσομαι | ἦλθον | I come/go |
| φέρω | οἴσω | ἤνεγκα / ἤνεγκον | I carry/bear |
| λέγω | ἐρῶ | εἶπον | I say |
| αἱρέω | αἱρήσω | εἷλον | I take/choose |
| ἐσθίω | φάγομαι | ἔφαγον | I eat |
| τρέχω | — | ἔδραμον | I run |
Note: These suppletive verbs are among the most frequent in the GNT. Memorizing their principal parts is essential. The good news: you have already encountered most of these roots in your vocabulary study.
5. Principal Parts System¶
Greek grammars organize verb forms into six principal parts, each representing a unique stem:
| Principal Part | Form Type | Tense/Voice |
|---|---|---|
| 1st | Present active 1sg | Present active/middle |
| 2nd | Future active 1sg | Future active/middle |
| 3rd | Aorist active 1sg | Aorist active/middle |
| 4th | Perfect active 1sg | Perfect active |
| 5th | Perfect middle/passive 1sg | Perfect middle/passive |
| 6th | Aorist passive 1sg | Aorist/future passive |
Example for λύω (regular):
| PP | Form | |
|---|---|---|
| 1st | λύω | Present active |
| 2nd | λύσω | Future active |
| 3rd | ἔλυσα | Aorist active |
| 4th | λέλυκα | Perfect active |
| 5th | λέλυμαι | Perfect middle/passive |
| 6th | ἐλύθην | Aorist passive |
Example for ὁράω (suppletive):
| PP | Form | |
|---|---|---|
| 1st | ὁράω | Present active |
| 2nd | ὄψομαι | Future middle (deponent) |
| 3rd | εἶδον | Aorist active (2nd aorist) |
| 4th | ἑώρακα / ἑόρακα | Perfect active |
| 5th | ἑώραμαι | Perfect middle/passive |
| 6th | ὤφθην | Aorist passive |
6. Using a Greek Lexicon¶
When you encounter an unfamiliar verb form, follow these steps to find the lexical entry:
- Identify the tense formant: σ (future/1st aorist), θη (aorist passive), reduplication (perfect)
- Remove augment if present: ε- prefix or vowel lengthening indicates past tense
- Reverse stop + σ combinations: ψ → φ/π/β + -, ξ → χ/κ/γ + -
- Check for nasal infixes: μβ, νθ, ντ in present stem may not appear in lexicon form
- Look up the resulting stem in BDAG or another lexicon
Note: Most intermediate grammars include a principal parts list in the back. BBG Appendix lists all verbs with irregular principal parts. Consulting this list regularly builds pattern recognition faster than individual memorization.
7. Summary of Pattern Types¶
| Pattern | Characteristic | Examples |
|---|---|---|
| 1 | Regular σ formant, no stem change | λύω, πιστεύω |
| 2 | Stop + σ → ψ or ξ or σ | γράφω, ἄγω, πείθω |
| 3 | Vowel change / nasal infix in present | λαμβάνω, μανθάνω |
| 4 | Completely different stems (suppletive) | ὁράω, ἔρχομαι, φέρω |