"The people never appeared at the harbour."
Translation:Folket dukkede aldrig op ved havnen.
It's not clear to me what can go between "dukker/dukkede" and "op" ; do adverbs need to be placed in between? Are there other things? (In German essentially everything goes in between...)
You can add adverbs in between dukker and op. Often you can also add adverbs after op