English Translation
It was so hot that we couldn’t walk for long.
This sentence seems to break one common rule of thumb, that durante is a trigger for the preterite tense, as it defines a duration. 
Surely, pudimos would work here, right?
It was so hot that we couldn’t walk for long.
This sentence seems to break one common rule of thumb, that durante is a trigger for the preterite tense, as it defines a duration.
Surely, pudimos would work here, right?