Past simple (strong verbs)

Onvoltooid verleden tijd: sterke werkwoorden


Sterke werkwoorden veranderen van klinker in de verleden tijd, zoals bleef, hielp, rook.

(Strong verbs change their vowel in the past tense, such as bleef, hielp, rook.)

What makes a verb “strong” in the simple past (OVT)?

Strong verbs form the simple past with a vowel change (klinkerwisseling).

  • No -de/-te ending (that is for weak verbs).
  • Singular: the past form is the verb stem with the new vowel (no extra ending).
  • Plural: add -en to the plural past form.

Quick formation: singular vs plural

Subject Rule Example (blijven)
ik / jij / hij / zij / u past form (vowel change) + no ending ik bleef
wij / jullie / zij past plural + -en wij bleven

The “vowel change” patterns: use them as recognition tools

Don’t try to invent the past tense. Recognise the pattern and memorise the common verbs.

  • ij → ee: blijven → bleef, kijken → keek
  • ie → oo: kiezen → koos, vliegen → vloog
  • ui → oo: sluiten → sloot, ruiken → rook
  • i → o: beginnen → begon, drinken → dronk
  • e → a / ie / o / oo: eten → at, helpen → hielp, trekken → trok, wegen → woog

Tip: If you see a form like bleef, keek, koos, rook, it’s almost certainly a strong verb.

Common mistakes (and how to self-correct)

  • Mistake 1: adding -te/-de anyway

    ik rookteik rook

    hij hielptehij hielp

  • Mistake 2: forgetting -en in the plural

    wij hieldwij hielden

    wij begonwij begonnen

  • Mistake 3: mixing up simple past with the past participle

    Simple past (OVT): ik hielp

    Past participle (perfect tense): ik heb geholpen

Self-check in 3 steps (before you submit an answer)

  1. Is it a strong verb? (Does it appear in the strong-verb list/table?)

  2. Is the subject singular or plural?

    • Singular → no ending
    • Plural → add -en
  3. Did you avoid -de/-te? If you see -de/-te in your answer, double-check.

Mini examples you can reuse in conversation

  • Ik bleef rustig.

  • Wij bleven bij de deur.

  • Ik rook rook in het trappenhuis.

  • We kozen een andere verzekering.

  • Mijn collega hielp mij.

  • Ik wist het adres niet.

  1. In the onvoltooid verleden tijd (simple past) of strong verbs, you see a vowel change.
  2. In the plural, -en is added.
  3. In the singular, nothing is added.
  4. With strong verbs, no -te(n)/-de(n) is added.
Categorie (Category)Infinitief (Infinitive)O.v.t. (Simple past)
ij → eeblijven (to stay)
kijken (to look)
bleef (stayed)
keek (looked)
ie → ookiezen (to choose)
vliegen (to fly)
koos (chose)
vloog (flew)
ui → ooruiken (to smell)
sluiten (to close)
rook (smelled)
sloot (closed)
i → obeginnen (to begin)
drinken (to drink)
begon (began)
dronk (drank)
e → otrekken (to pull)
vechten (to fight)
trok (pulled)
vocht (fought)
e → ooscheren (to shave)
wegen (to weigh)
schoor (shaved)
woog (weighed)
a → ieblazen (to blow)
laten (to let)
blies (blew)
liet (let)
e → aeten (to eat)
genezen (to recover)
at (ate)
genas (recovered)
e → iehelpen (to help)
bederven (to spoil)
hielp (helped)
bedierf (spoiled)

Overige: (Other:)
i → a



a → oe


ou → ie
e → i
o → e

liggen (to lie (be located))
bidden (to pray)

dragen (to carry)
varen (to sail)

houden (to hold)
weten (to know)
worden (to become)

lag (lay)
bad (prayed)

droeg (carried)
voer (sailed)


hield (held)
wist (knew)
werd (became)

Exercise 1: Multiple choice

Instruction: Choose the correct answer

Fetching your corrections... Please don't close this page yet.

1. Gisteren ____ ik aan de lijn totdat de ambulance er was.

Yesterday I ____ stayed on the line until the ambulance was there.

2. De brandweer kwam snel, want ik ____ iets in het trappenhuis.

The fire brigade arrived quickly, because I ____ something in the stairwell.

3. Toen de ambulance arriveerde, ____ ik de gewonde man rustig naar binnen.

When the ambulance arrived, I ____ the injured man calmly inside.

4. Vorige week ____ ik op de spoedeisende hulp meteen geholpen.

Last week I ____ helped immediately in the emergency room.

Exercise 2: Rewrite the phrases

Instruction: Put the sentences into the simple past tense (imperfect). Use the strong verb in parentheses and add -en in the plural.

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  1. Ik (blijven) gisteren thuis, want ik was moe.
    ⇒ ______________________________________________________________________________________________________________ Example
    Ik bleef gisteren thuis, want ik was moe.
    (I stayed at home yesterday, because I was tired.)
  2. Wij (kiezen) een nieuwe zorgverzekering, omdat de oude te duur was.
    ⇒ ______________________________________________________________________________________________________________ Example
    Wij kozen een nieuwe zorgverzekering, omdat de oude te duur was.
    (We chose a new health insurance policy, because the old one was too expensive.)
  3. Jij (ruiken) de koffie al in de gang.
    ⇒ ______________________________________________________________________________________________________________ Example
    Jij rook al koffie in de gang.
    (You already smelled coffee in the hallway.)
  4. We (beginnen) om 09.00 uur met de vergadering.
    ⇒ ______________________________________________________________________________________________________________ Example
    We begonnen om 09.00 uur met de vergadering.
    (We began the meeting at 09:00.)

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Kato De Paepe

Business and languages

KdG University of Applied Sciences and Arts Antwerp

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Last Updated:

Thursday, 07/05/2026 12:14