I have some questions about transitivity: 貯める and 貯まる


  1. I can usually hear people say 'お金を貯めるために、アルバイトをする’, but if I use the 自動詞 '貯まる' instead of the 他動詞 in the sentence, like 'お金が貯まるために、アルバイトをする', is it also acceptable?

  2. You know I have a big problem with using Japanese 自動詞 and 他動詞 properly, I always get confused with the differences between them. For instance, '車がへいに突き当たる’, in this phrase, the subject 'the car' has a direct action on the wall. Why is the verb '突き当たる' a 自動詞 and not a 他動詞?




Let's see...

  1. ~~Both are grammatically correct~~ This is wrong.See [Difference between ために and ように](https://japanese.stackexchange.com/questions/12450/difference-between-%E3%81%9F%E3%82%81%E3%81%AB-and-%E3%82%88%E3%81%86%E3%81%AB)  
but still

> a. お金を貯めるために、アルバイトをする。  
>  "Do a part time job to save money."
>
> b. お金が貯まるために、アルバイトをする。  
>  "Do a part time job so that money will be saved up."

(b) gives a feeling that you don't have control over saving money; i.e., you
start part timing and hope money will pile up. This is not the case with (a).

  2. It is "The car crashed into the wall." and not "The car crashed the wall." 

In English, _crash_ is both transitive and intransitive:

> "MS Windows crashed." (Intransitive)  
>  "Buggy software crashed Windows." (Transitive)

