Past tense of modal verbs

Setting the Scene with "Þegar"

To tell stories about your childhood or early schooling, you will often use the word þegar (when). This is typically followed by the simple past tense, such as var (was).

When I was in the preschool, my dream was small.
Þegar ég var í leikskólanum var draumurinn minn lítill.

When discussing childhood dreams, past abilities, or school rules, modal verbs are essential. In the past tense, these verbs often undergo a vowel change.

Here are the most common modal verbs and their past tense forms for the 1st and 3rd person singular (ég / hann / hún / það):

PresentPastMeaning
viljavildiwanted to
kunnakunniknew how to / could
þurfaþurftihad to / needed to
megamáttiwas allowed to
ætlaætlaðiintended to

Let's look at vilja (to want). Just like in the present tense, it links directly to the following infinitive verb without the word (to).

When I was young, I wanted to become a pilot.
Þegar ég var ungur vildi ég verða flugmaður.
My dream was big, and I wanted to see the future.
Draumurinn minn var stór og ég vildi sjá framtíðina.

When talking about early skills you had (or lacked), use kunna:

In the preschool, I did not know how to write.
Í leikskólanum kunni ég ekki að skrifa.

When expressing past obligations (having to do something), use þurfa. Remember that for plural subjects like við (we), the verb takes a plural ending, becoming þurftum.

The engineer had to calculate a lot in the primary school.
Verkfræðingurinn þurfti að reikna mikið í grunnskólanum.
We had to learn a lot in the primary school.
Við þurftum að læra mikið í grunnskólanum.

To talk about past intentions or rules, use ætla and mega. With plural subjects, these become ætluðu and máttu.

The boys intended to play football yesterday.
Strákarnir ætluðu að spila fótbolta í gær.
The pilot and the sailor were not allowed to talk together.
Flugmaðurinn og sjómaðurinn máttu ekki tala saman.

Making Decisions

As you grew up and thought about the future, you had to make choices. The verb ákveða (to decide) is very useful for explaining your past ambitions. Its past tense form is ákvað (decided).

He decided to become an engineer because he wanted to build houses.
Hann ákvað að verða verkfræðingur af því að hann vildi byggja hús.
The kid always wanted to be an adult.
Krakkinn vildi alltaf vera fullorðinn.