Breakdown of Ils ont fini cette étape en quatre heures.
ils
they (masculine/mixed)
avoir
to have
ce
this (before a noun)
quatre
four
Questions & Answers about Ils ont fini cette étape en quatre heures.
Why does this sentence use en quatre heures instead of dans quatre heures?
This highlights the main difference between these two prepositions! Use en to express how long it takes to complete an action (they spent four hours doing it). Use dans to say when an action will start (for example, "they will start in four hours"). Because this sentence describes an action that was actively being done over a block of time, en is the correct choice.
Why use the passé composé (ont fini) here rather than the imparfait (finissaient)?
I often see "stage" translated as scène. Why use étape here?
Why is it cette étape and not cet étape? Both are for words starting with a vowel, right?