Time ago (for ... siden)

The Circumposition "for ... siden"

To say how long ago an event happened, Danish uses a circumposition—a phrase that wraps around both sides of the time expression. The structure is for + [time period] + siden.

He invented the telephone a hundred years ago.
Han opfandt telefonen for hundrede år siden.
The research began many years ago.
Forskningen begyndte for mange år siden.

Discussing History and Discoveries

When talking about historical milestones, you will frequently use this structure alongside past tense verbs like opdagede (discovered), opfandt (invented), or gjorde (made).

She discovered the planet forty years ago.
Hun opdagede planeten for fyrre år siden.
The researcher made the discovery a century ago.
Forskeren gjorde opdagelsen for et århundrede siden.

Questions and Negations

When asking a question, use standard inverted word order (verb-subject) and keep the for ... siden expression at the end of the sentence.

Did she build the machine twenty years ago?
Byggede hun maskinen for tyve år siden?

To make a negative statement, place ikke after the verb (and subject, if inverted), keeping the time expression at the end.

They did not discover the planet five years ago.
De opdagede ikke planeten for fem år siden.

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