This book is so difficult that I can't read it.
The task is so difficult that I cannot accomplish it.
The injury is so difficult that a permanent incapacity for work arises.
La blessure est si difficile qu'une incapacité permanente de travail se présente.
The road becomes so difficult that we have to abandon the truck.
The negotiations were so difficult that both parties nearly threw up their hands.
Les négociations étaient si difficiles que les deux parties ont failli jeter l'éponge.
This hike is one of the most difficult that we offer.
The chess problem was so difficult that few could find the solution.
Le problème d'échecs était si difficile que peu de gens ont pu trouver la solution.
It's so difficult that most men tremble at its mere thought.
C'est si difficile que la plupart tremblent juste à y penser.
It is so difficult that when it happens you have to celebrate it.
C'est si difficile que quand cela arrive il faut le célébrer.
It's is so difficult that I have decided to give up trying.
C'est tellement difficile que j'ai décidé d'arrêter d'essayer.
It was so difficult that I was about to give up.
C'était si difficile que j'étais sur le point d'abandonner.
It's so difficult that I've decided to give up trying.
C'est tellement difficile que j'ai décidé d'arrêter d'essayer.
This game is much more difficult that it seems.