행사는

행사는

"행사는" means "event" or "function."

Here, '행사는' (haengsa-neun) is used as the topic of the sentence, meaning 'event', and is marked with the topic particle '-는' to emphasize that topic.

행사는 오늘 저녁에 시작됩니다.

The event starts this evening.

In this sentence, '행사는' acts as the topic and is used to discuss the nature of a specific event, describing expectations around it.

행사는 재미있게 진행될 것으로 기대됩니다.

The event is expected to proceed interestingly.

Here, '행사는' identifies the specific event being discussed and establishes it as the sentence's main focus by using the topic particle '-는'.

이번 행사는 올해 최고로 손꼽히고 있습니다.

This event is considered the best of the year.