Breakdown of Ze moeten de documenten ergens anders hebben neergelegd.
hebben
to have
ergens
somewhere
moeten
to have to, must
het document
the document
Questions & Answers about Ze moeten de documenten ergens anders hebben neergelegd.
Why is moeten in the present tense if the sentence is about a past event ("must have put")?
When you make a logical deduction about the past, the deduction itself is happening right now. Just like in English, the modal verb moeten is in the present tense to show your current certainty ("they must..."), while the past action is expressed by the perfect infinitive hebben neergelegd ("...have put down").
Can I swap the order of the verbs at the end and say neergelegd hebben?
Yes, absolutely! Because moeten is the conjugated verb in the second position, it pushes the remaining verbs to the end of the sentence. For this final verb cluster, you can put the auxiliary before the participle (hebben neergelegd) or the participle before the auxiliary (neergelegd hebben). Both are grammatically correct and common.
How exactly does ergens anders translate to "somewhere else"?
ergens means "somewhere" and anders generally means "different" or "otherwise". When placed together, ergens anders is the standard Dutch way to say "somewhere else". This is a very consistent pattern; you will also frequently see iets anders (something else) and iemand anders (someone else).
Why is the ge- prefix in the middle of neergelegd?