The second past tense in Norwegian is called "Perfektum", and is formed as follows:

Han rydder stua.

Han spiser middag.

The general rule is this: Put "har" in front, and then the simple past form - but if that ends on a vowel; cut if off..

Some exceptions:

To switch to present perfect::

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For a great list of 400 verbs with tenses and translation - download it here: https://gumroad.com/practicenorwegian!

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