Breakdown of Devo riordinare i libri che ho accumulati negli anni.
il libro
book
l'anno
the year
avere
to have
in
in / made of (material)
Questions & Answers about Devo riordinare i libri che ho accumulati negli anni.
Why is it accumulati instead of accumulato here?
In compound tenses with avere, the past participle normally ends in -o. However, when the direct object comes before the verb as the relative pronoun che (referring to i libri), you have the option to make the past participle agree with it. Since i libri is masculine plural, accumulato becomes accumulati. Both ho accumulato and ho accumulati are correct here.
Is it more common to use agreement with che or to leave it unchanged?
In everyday spoken Italian, it is much more common to leave it unagreed and just say che ho accumulato. Making the participle agree with che sounds slightly more formal, literary, or careful. As a B2 learner, it is important to recognize this structure, even if you choose not to use it in daily conversation.
Wait, doesn't the past participle always have to agree with a preceding direct object?
It is only mandatory to agree the past participle with the third-person direct object pronouns (lo, la, li, le). For example, if you said Li ho accumulati (I have accumulated them), the agreement is mandatory. But when the preceding direct object is the relative pronoun che, the agreement is strictly optional.
Why is 'over the years' translated as negli anni rather than or ?