ведь

very common #222B1

1.
after all, surely, indeed, in fact
Ты ведь обеща́л прийти́.
You did promise to come, after all.
Unstressed particle that strengthens the statement and appeals to shared knowledge; often best rendered by 'you know' or simply by intonation.
2.
because, since, for, given that
Он зна́ет французский, ведь он учи́л его в университе́те.
He knows French, because he studied it at university.
Used to explain or justify the preceding statement.
3.
isn't it?, right?, aren't you?
Ведь уже́ по́здно?
It's late already, isn't it?
In questions it invites the hearer to confirm; corresponds to an English tag question.

Usage info

ведь serves as both a conjunction and a particle, depending on the context.

Emphasis or Reminder:
Ты ведь обещал помочь. You promised to help, remember?
My view is that they liked this. We already talked about that, remember?

Logical Connection:
Я хочу узнать, ведь это важно. (I want to know, since it is important

Confirmation or Surprise:
On you saw the lottery! (He won the lottery, you knew that!)
This is how it is! (It's so easy, you didn't know!)

Ты не забы́л, ведь так?
You didn't forget, did you?
Ты нехоро́ший. Ты и сам э́то зна́ешь, так ведь?
You are not a good person. You know that, right?
Ты ведь не встаёшь так рано, как твоя́ сестра́, пра́вда?
You don't get up as early as your sister, do you?
Ты ведь говори́шь по-французски, пра́вда?
You speak French, right?
Ты ведь не шпио́н, так?
You aren't a spy, are you?
Э́то ведь возможно, да?
It's possible, isn't it?
Ты ведь был ревни́вым?
You were jealous, weren't you?
Вы ведь не шпио́нка, да?
You aren't a spy, are you?