I can't ... for you
I can't forget you.
No te puedo prestar este libro.
I can't lend you this book.
I can’t sell you that.
I can't stop you.
I can't promise you anything.
No te puedo acompañar el lunes.
I can't go with you on Monday.
No te puedo creer, la vieja Olivetti.
I can't believe it, old Olivetti.
— El secreto de sus ojos (2009)
No te puedo ofrecer nada a cambio.
I can't offer you anything in return.