Breakdown of ¿Cómo habrán cosido esta manga de encaje?
de
from / of
cómo
how
esta
this (feminine)
haber
(auxiliary) have
Questions & Answers about ¿Cómo habrán cosido esta manga de encaje?
Why use the future tense habrán when the sleeve has already been sewn in the past?
In Spanish, the future perfect (haber in the future tense + a past participle) isn't just used for actions that will be completed in the future. It is also used to express wonder, probability, or a guess about the past. By saying habrán cosido, the speaker is expressing curiosity: 'How might they have sewn...?' or 'I wonder how they sewed...?'
Who does the 'they' in habrán refer to if no specific people were mentioned?
Cosido sounds exactly like the word for cooked or boiled. Is there a trick to telling them apart?
You are thinking of cocido, from the verb cocer (to cook or boil). In Latin American Spanish, coser (to sew) and cocer are pronounced identically because the letters 's' and 'c' (before 'e' or 'i') make the same 's' sound. You have to rely entirely on context. Since the sentence mentions a manga de encaje (lace sleeve), it's clearly about sewing!
Why do we need the word de in manga de encaje?