Breakdown of Ég er nýbúin að sjá tunglið út um gluggann.
Questions & Answers about Ég er nýbúin að sjá tunglið út um gluggann.
Vera nýbúin/nýbúinn að + infinitive means to have just done something or to be newly finished with doing something.
So:
- Ég er nýbúin að sjá... = I have just seen...
It is a very common Icelandic way to talk about something that happened very recently.
Because nýbúinn is an adjective/participle that agrees with the subject in gender and number.
Here the subject is ég (I), and the form nýbúin tells us the speaker is female.
Common forms are:
- ég er nýbúinn að... = a male speaker
- ég er nýbúin að... = a female speaker
- við erum nýbúin að... = plural, mixed/feminine-type form depending on context
- við erum nýbúnir að... = plural masculine/mixed group
So this sentence specifically sounds like it is being said by a woman.