0 used to ask or talk about a choice between two or more things -- qual, que
1 used to show what thing is being talked about or written about -- que, o qual, a qual
These are principles which we all believe in.
2 used to give more information about something -- que, o qual, a qual
The book, which includes a map, gives you all the information you need about Venice.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Podemos completá-lo passo a passo, por mais longa que seja a estrada e não pode ser concluída, por mais curta que seja a estrada, se você nem mesmo marcar sua pegada.
