eki no erebeetaa ga koshoushita node, kaidan o tsukaimashita.

Because the elevator at the station broke down, I used the stairs.

Breakdown of eki no erebeetaa ga koshoushita node, kaidan o tsukaimashita.

• を: direct object particle
• が: subject particle
• の: possessive case particle
• 駅えき: station

Questions & Answers about eki no erebeetaa ga koshoushita node, kaidan o tsukaimashita.

Why is の used in 駅のエレベーター?

の links two nouns. Here, 駅のエレベーター means the elevator of the station or more naturally the station elevator.

In Japanese, の does much more than show possession. It can also show:

• location/association: 駅のエレベーター = the elevator at the station
• category: 日本の車 = Japanese cars / cars from Japan
• belonging: 私の本 = my book

So this does not necessarily mean the station "owns" the elevator in a strict sense. It just identifies which elevator we mean.

Why is it エレベーターが and not エレベーターは?

が marks the thing that experienced the breakdown.

In エレベーターが故障した, the elevator is the thing that broke down, so が is natural.

Compare:

• エレベーターが故障した
  = The elevator broke down.
  Focus is on the event/the elevator as the thing affected.

• エレベーターは故障した
  = As for the elevator, it broke down.
  This can sound more contrastive, like maybe comparing it to something else.

So が is the most straightforward choice here.

Why is 故障した in the past tense?