The Subjunctivisor!
Does de modo que require the subjunctive?
De modo que may require the subjunctive, depending on the certainty and reality of the subordinate clause:
Por ejemplo …
Puede caminar al trabajo de modo que no necesita un coche.
He can walk to work, thus he doesn’t need a car. (consequence)Camino al trabajo de modo que pierde peso.
He walks to work (in order) to lose weight. (objective)