Questions & Answers about A quem pediste ajuda?
Why does the sentence start with "A"?
The verb pedir (to ask) uses the preposition a to indicate who you are asking. In Portuguese, you don't just "ask someone", you "ask to someone". So, A quem literally translates to "To whom".
Where is the word for "for" in this sentence?
The verb pedir inherently means "to ask for" when you are requesting an object, an action, or a favor. Because of this, you don't need to add an extra preposition for "for" before ajuda (help).
How do we know this means "did you ask" if the word "tu" isn't there?