Na nádraží byla včera dopoledne také dlouhá fronta na lístky na vlak.

At the station yesterday morning there was also a long line for train tickets.

Breakdown of Na nádraží byla včera dopoledne také dlouhá fronta na lístky na vlak.

• být: to be
• včera: yesterday
• také: also
• lístek: the ticket

Questions & Answers about Na nádraží byla včera dopoledne také dlouhá fronta na lístky na vlak.

Why does the sentence start with Na nádraží and not with the subject dlouhá fronta?

Czech word order is flexible and often used to express what is known vs. new information, and what you want to emphasize.

• Na nádraží (at the station) is placed first to set the location as the topic.
• The fronta (queue) is the new or more important information, so it comes later:
  Na nádraží byla … dlouhá fronta…

You could say:

• Dlouhá fronta na lístky na vlak byla včera dopoledne na nádraží.
  This is grammatically fine, but it emphasizes the queue itself more than the place.

Typical neutral order here is:
[Place] – [verb] – [time] – [other info / subject complement]

Why is the verb byla used here, and not byl or bylo?

Byla is the past tense of být (to be) for feminine singular subjects.

• fronta is a feminine noun (the basic form is ta fronta – that queue).
• Therefore, the past tense of být must match it in gender and number:
  
  • masculine sg: byl
  • neuter sg: bylo
  • feminine sg: byla

So you get:
dlouhá fronta … byla (a long queue … there was).