이후

You can use 이후 to talk about a period of time after an event. For example, '사고 이후' means 'after the accident' or 'since the accident'.

They are similar, but not always interchangeable. 후에 generally means 'after a specific point in time,' while 이후 refers to 'the period of time following an event.' Think of 후에 as 'later' and 이후 as 'from then on.'

Yes, but you need to attach it to a noun form of the verb. For example, '졸업 이후' (after graduation). You wouldn't say '공부하다 이후'.

Here's one: 결혼 이후, 우리는 행복하게 살고 있어요. (After getting married, we are living happily.)

이후 is generally neutral in formality and can be used in both formal and informal contexts.

Yes, exactly! It often carries that meaning. For example, '그 사건 이후로' means 'since that incident'.

You often see it with the particle -로 (이후로) to emphasize 'from that point onwards.' For example, 그날 이후로 (Since that day).

It typically refers to a past or present event and the time that has passed since then. While you could hypothetically use it, it's much more common for past events.

You'd usually say '3년 후' for 'after 3 years.' While '3년 이후' isn't incorrect, '후' is more common for specific durations after a point.

Consider: 점심 식사 이후에 우리는 회의를 시작했다. (After lunch, we started the meeting.) Here, it clearly indicates the period after lunch.