Breakdown of Dudo que él haya ensamblado y pulido ese resorte hoy.
él
he
y
and
ese
that (masculine)
hoy
today
que
that / than
haber
(auxiliary) have
dudar
to doubt
pulir
to polish
el resorte
spring (mechanical)
ensamblar
to assemble
Questions & Answers about Dudo que él haya ensamblado y pulido ese resorte hoy.
Why is haya used here instead of ha or hubiera?
The phrase Dudo que (I doubt that) introduces uncertainty, which triggers the subjunctive mood. We use the present perfect subjunctive (haya + past participle) because the action potentially happened recently or relates to the present time frame of today (hoy).
Why does pulido not have its own auxiliary verb, like haya pulido?
Just like we drop the -mente suffix on the first of two coordinated adverbs, Spanish avoids redundancy with compound verbs. When two past participles share the same auxiliary verb and subject, you only need to use haya once before the first verb (ensamblado) and can safely drop it before the second (pulido).
Does resorte mean the season 'spring'?
No, resorte specifically refers to a mechanical spring (like a metal coil). For the season of spring, you would use primavera, and for a natural water spring, you would use manantial or fuente.
Is the pronoun él strictly necessary in this sentence?
It isn't strictly required grammatically, but it is very helpful for clarity. Because the first-person (yo) and third-person (él, ella, usted) forms are identical in the present perfect subjunctive (haya), including él prevents any confusion about who might have done the assembling.
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