São expressões usadas todos os dias em : mais formal e menos formal .
More Formal Less formal
Yes. Yeah.
Thank you. Thanks.
Hello. Hi.
How are you ? How are you doing ?
I´m fine. Ok ! / Pretty good .
Good-Bye. Bye. See you .
Por exemplo:
More formal
A. Hello! How are you ?
B. I´m fine
Less formal
A. Hi! How are you doing ?
B. Pretty good.