For as a preposition:
* para: This is the most common translation, used for many situations, such as purpose, destination, or recipient.
* Example: "Eu vou para a escola." (I'm going to school.)
* por: This is used when referring to a reason, cause, or exchange.
* Example: "Eu fiz isso por você." (I did that for you.)
* a: This is used before infinitives (verbs ending in "-ar", "-er", or "-ir") to express purpose.
* Example: "Eu estou aqui a estudar." (I'm here to study.)
For as a conjunction:
* pois: This means "because" or "for" when introducing a reason or explanation.
* Example: "Ele não veio, pois estava doente." (He didn't come because he was sick.)
* porque: This also means "because" and is used more commonly than "pois".
* Example: "Ela está feliz, porque ganhou na loteria." (She's happy because she won the lottery.)
Other ways to express "for":
* por causa de: This means "because of" or "for the sake of".
* Example: "Eu fiz isso por causa de você." (I did this for your sake.)
* em nome de: This means "in the name of" or "for the sake of".
* Example: "Ele fez isso em nome da justiça." (He did that in the name of justice.)
It's important to choose the correct word based on the specific situation and the intended meaning. If you provide me with the context or sentence you are trying to translate, I can give you a more precise translation.