Breakdown of Так как я наработался за неделю, я хочу отдыхать на ярмарке.
я
I
отдыхать
to rest
хотеть
to want
на
on, at / by (transport) / to (a place) / to (in answer to)
Questions & Answers about Так как я наработался за неделю, я хочу отдыхать на ярмарке.
How does the verb наработался get its meaning of "had my fill of work"?
This is the core of the satiation pattern. By adding the prefix на- (which often means accumulation) and the reflexive postfix -ся (directing the action back to the subject) to the verb работать (to work), you get наработаться. It means to work until you have had enough or to exhaustion. Since it represents reaching a limit, it is always a perfective verb.
Why do we use за неделю here to express "during the week"?
The preposition за followed by the accusative case is used to express the amount of time it takes to complete a perfective action. Because наработался is perfective, meaning the speaker successfully reached their limit of work, за неделю tells us it took the course of the week to achieve that state.
Could I use потому что instead of так как at the beginning of the sentence?
No, it is structurally unnatural and generally considered incorrect to start a Russian sentence with потому что. When you want to place the "because" or "since" clause at the very beginning of a sentence, you must use так как or поскольку.
Why use the imperfective отдыхать (to rest) rather than the perfective отдохнуть?