Verb stem plus や meaning


I came across the following sentence:

> ワタシをわすれちゃいやだよ

I'm guessing it means something like:

> You forgot me!

But what is happening / what is the meaning with the `や` being attached to
`ちゃう`'s verb stem?




Pretty sure ちゃ is the shortened form of ては. では/ては can be used in a similar way
to the conditional たら, but only for negative results. For example:

> 忙しい時に、仕事を休まれては困ります。  
>  It will be a problem if you skip work when we are busy.

There are many other ways to use this grammar point, including what you
mentioned in the comments.

> そうしなくてはいけません。  
>  そうしなくちゃいけません。  
>  You have to do it that way.

For your example, if you expand the sentence, it should become:

> 私を忘れては **いや** だよ。  
>  If you forgot me I would feel bad. (literal translation)  
>  I don't want you to forget me. (natural translation)

いや・嫌 here just expresses that the speaker is emotionally opposed to this
happening. So "If you forgot me, I would have negative emotions." I hope this
helps :)




Pretty sure ちゃ is the shortened form of ては. では/ては can be used in a similar way
to the conditional たら, but only for negative results. For example:

> 忙しい時に、仕事を休まれては困ります。  
>  It will be a problem if you skip work when we are busy.

There are many other ways to use this grammar point, including what you
mentioned in the comments.

> そうしなくてはいけません。  
>  そうしなくちゃいけません。  
>  You have to do it that way.

For your example, if you expand the sentence, it should become:

> 私を忘れては **いや** だよ。  
>  If you forgot me I would feel bad. (literal translation)  
>  I don't want you to forget me. (natural translation)

いや・嫌 here just expresses that the speaker is emotionally opposed to this
happening. So "If you forgot me, I would have negative emotions." I hope this
helps :)

