"You gave him the same gift every Christmas!"

Translation: Tu lui offrais le même cadeau à chaque Noël !

[LSadun]

What is the role of a? Why not just chaque Noel? Or tous les Noels?

[Sitesurf]

"À" is optional but common in informal speech before such phrases as "à chaque fois, à tous les coups, etc."

[IRtbja6k]

It marked me wrong when I left the "à"

[Michael284133]

So leaving it out is not wrong then?

[paul959862]

tu lui as donné le même cadeau chaque Noël

[csillamdelfin]

"Vous lui offriez le même cadeau tous les Noël." was accepted.
I think Duo wants us to use imparfait for this sentence.

[Seenoff]

Surely it must be the perfect tense here? To have given a present to someone is a "one off" event in time.

[Sitesurf]

"Every Christmas" points to a repeated event, hence the imperfect tense "vous lui offriez" or "tu lui offrais".

[GonzaloNav488130]

Tu lui as offert le même cadeau à chaque Noël should be accepted. There was no Èwere givingÈ to make the imperfect the only correct translation.

[IshitaSing739146]

Is tu à lui offrais wrong?? If yes then please tell why..

[Sitesurf]

Object pronouns are placed before the verb.

• Direct objects as in "Je le vois" = I see him.
  Direct object pronouns are: me, te, le/la, nous, vous, les.

• Indirect objects for every verb constructed with the preposition "à", like "offrir à" : tu lui offrais = you gave him
  Indirect object pronouns are: me, te, lui, nous, vous, leur

As you can tell, when you place an indirect object pronoun before the verb, you don't need "à".

[Vic3141]

I'm grateful for the reminder