Learn Danish: Jeg har allerede ryddet op i køkkenet. - I have already tidied up in the kitchen.

In a Danish main clause, central adverbs like allerede (already) or ikke (not) must be placed right after the first verb. Here, the first verb is the helper verb har. Because of this rule, the adverb naturally sits between har and the past participle ryddet.

How do we form the past participle 'ryddet' from the infinitive 'at rydde'?

At rydde is a regular verb. To form its past participle, you take the stem of the verb and add -et. For verbs that already end in -e in their infinitive form, this often looks exactly like just adding a -t to the end: rydde becomes ryddet.

Why are 'ryddet' and 'op' two separate words here?

The action here is at rydde op (to tidy up). This is a phrasal verb made of a verb and a short word called a particle. When you use it in the present perfect tense, the main verb (ryddet) and the particle (op) remain separate words. You cannot combine them into one word for the action.

Why does 'køkkenet' end with '-et'?

This is a quick refresher on definite nouns! The Danish word for a kitchen is et køkken. Because it is a neuter noun (an et-word), we take that et and attach it to the end of the word to mean 'the kitchen', which gives us køkkenet.