La semaine dernière. Hope this helps !
In French, "last week" is "la semaine dernière", or possibly also "la semaine passée".
le week-end dernier
J'ai dansé week-end dernier
You would say "Cette semaine" Which means this week in french!
Into the week is "pendant la semaine" in French.
"qu'est-ce que tu as fait le week-end dernier ?"
No. You do not say in the last. You can say at last meaning after all this time. You can say in the last week meaning during the current week
J'étais content(e) de vous voir la semaine dernière.
"ta semaine"
Semaine suivante
Bonne semaine!
The last chance is "la dernière chance" in French.