Pelo/a and para usage confuse me. Can anyone offer an explanation or a link?
"eu quero um quarto pela noite" should do it , shouldn't it ?
It does not work. When you show purpose, you should use "para".
Is there any real difference between "esta" and "essa"? What do they translate? This or that or both?
Both essa and esta are correct. That is usually for things that are away, translated as aquele/aquela
This = este, esta
That = esse, essa, aquele, aquela
These = estes, estas
Those = esses, essas, aqueles, aquelas