Qual a diferença: What's up? How's it going? How are things? How’ve you been? What have you been up to?

what's up? How's it going? How are things? How’ve you been? What have you been up to?
What's the difference of these words?

TESTE DE NÍVEL
Faça um teste de inglês e descubra seu nível em 10 minutos! Este teste foi desenvolvido por professores experientes. O resultado sai na hora e com gabarito. Você ainda ganha o eBook sobre o Verbo Get em seu e-mail. INICIAR TESTE
1 resposta
Leonardo96 19 293
Those are just different alternatives for the same thing... Except for "what's up" which implies you want to know what the person you're talking to is doing at that exact moment. The others are just all different alternatives for asking someone what it's going on in their lives lately and how things are in general.