Questions & Answers about Elles sont montées sur la colline.
Why does montées have an extra -es at the end?
How do I know to use sont (from être) instead of ont (from avoir) here?
Monter (to go up or to climb) is one of the special verbs of movement or change of state. These verbs always use être as their helping verb in the past tense. You might remember them as the "Dr & Mrs Vandertramp" verbs or the "house of être" verbs.
Why do we use sur here? The translation says "up the hill", not "on the hill".
If the group of people had both men and women, would the sentence change?