GOODBYEused when you are leaving someone, or when they are leaving 再见 → hello
Goodbye, John, see you tomorrow.
再见,约翰,明天见。
I just have to say goodbye to Jane.
我得跟简道别。
say your goodbyes (=say goodbye to several people or everyone) 和众人道别
We said our goodbyes and left.
我们告辞后便离开了。
nTHESAURUS
goodbye used when you are leaving or when someone is leaving you. Goodbyesounds rather formal and is used especially when talking to people you do not know well. In everyday English people usually just say bye
‘Goodbye, Mrs Moore.’ ‘Goodbye, Dr Aziz.’
Thank you for calling. Goodbye.
bye goodbye
‘Bye, Annie.’ ‘Bye, Mom, ’ she said, kissing her mother on the cheek.
Bye everyone!
Bye for now (=used especially on the phone when you will speak to someone soon) - call me if you need anything.
see you informal used when saying goodbye to a friend who you will see again soon
See you, Darren.
‘I’m going now.’ ‘Okay. See you tomorrow.’
Safe trip back guys and we’ll see you soon.
later/catch you later informal used when saying goodbye to a friend you will see again soon. These expressions sound very informal and are used especially by young people
Catch you later, Matt.
‘Later, Mike.’ ‘Later, Steve.’
see you around informal used when saying goodbye to someone and you are not sure when you will see them again
He spent the night with me and then just said ‘See you around’ and left.
so longAmerican EnglishAmE used when saying goodbye to someone who you will not see again for a long time
‘So long, ’ he said. ‘Don’t forget to write.’
She grabbed Nick by the shoulders and hugged him affectionately. ‘So long, Nick.’
have a good weekend/a great trip etc used when saying goodbye to someone to wish them a good weekend, an enjoyabletrip etc
Have a nice weekend.
Have a great time at the concert, guys!
have a nice day used by people working in shops when saying goodbye to customers
Here’s your change. Have a nice day.
take care used when saying goodbye to someone, especially someone you like every much, to show that you care about them
‘Bye love ! Take care.’ ‘You too! Bye!’
cheerioBritish EnglishBrE informal goodbye. Cheerio sounds rather old-fashioned and is used especially by older people
Right, well we’re going now, cheerio then!
cheersBritish EnglishBrE informal goodbye – used especially by younger people