Questions & Answers about Quando é que o carteiro to deu?
What exactly is to in this sentence?
It is a contraction of two pronouns. The indirect object pronoun te (to you) combines with the direct object pronoun o (it). In Portuguese, te + o shrinks into the single word to, meaning "it to you".
Why does to come before the verb deu rather than after it?
Normally in Portugal, pronouns attach to the end of the verb. However, question words like Quando (when) act like magnets that pull pronouns to the front of the verb.
What purpose does é que serve here?