Questions & Answers about Vi flyttede hertil for ti år siden.
Why does the sentence use hertil instead of just her?
In Danish, you must distinguish between being in a location and moving to a location. The word her means being here (static), while hertil means moving to this place (directional). Because moving (flyttede) involves a change of location, you must use a directional adverb.
Could I use herhen instead of hertil?
You could, but hertil is much more natural here. herhen generally implies moving toward the speaker's exact physical spot (like walking over to someone). hertil is broader and often used for relocating to a town, country, or general area, making it the standard choice for moving homes.
How does the construction for ... siden work?
To say that something happened a certain amount of time ago, Danish wraps the time period between the words for and siden. You cannot just put a word at the end like the English ago. It must always follow the strict pattern of for + [amount of time] + siden.
Why doesn't the word år have a plural ending here?
The word år is a neuter noun (an et word) with a single syllable ending in a consonant, which means it takes no ending in the indefinite plural. Just as you say et år for one year, you say ti år for ten years.