Expressing 'if so'


> 暇（なら・としたら）ちょっと手伝って下さい。  
>  Hima (nara/toshitara) chotto tetsudatte kudasai.

Both the options seem grammatically correct.

Is it not so?




暇としたら is not grammatically correct. と here is related to the quoting particle
and for quoting a sentence, you want a full sentence, here 暇だ _hima da_ ,
giving 暇だとしたら _hima **da** to shitara_. In any case, I think the next two
options are better choices of saying "if you have time / if you're free"

  1. > 暇なら、ちょっと手伝ってください。  
>  _hima nara, chotto tetsudatte kudasai_

which is correct just the way you said it.

  2. > 暇だったら、ちょっと手伝ってください。  
>  _hima dattara, chotto tetsudatte kudasai_
>
> 暇 **でしたら** 、ちょっと手伝ってください。  
>  _hima **deshitara** , chotto tetsudatte kudasai_ (polite)

I myself would probably use the second one, although choosing between them
would depend on the situation.

We have a question explaining the differences between なら, ～たら and ～えば:
[Differences among -たら、なら、-んだったら、-えば,
etc](https://japanese.stackexchange.com/questions/393/differences-
among-%E3%81%9F%E3%82%89-%E3%81%AA%E3%82%89-%E3%82%93%E3%81%A0%E3%81%A3%E3%81%9F%E3%82%89-%E3%81%88%E3%81%B0-etc)




暇としたら is not grammatically correct. と here is related to the quoting particle
and for quoting a sentence, you want a full sentence, here 暇だ _hima da_ ,
giving 暇だとしたら _hima **da** to shitara_. In any case, I think the next two
options are better choices of saying "if you have time / if you're free"

  1. > 暇なら、ちょっと手伝ってください。  
>  _hima nara, chotto tetsudatte kudasai_

which is correct just the way you said it.

  2. > 暇だったら、ちょっと手伝ってください。  
>  _hima dattara, chotto tetsudatte kudasai_
>
> 暇 **でしたら** 、ちょっと手伝ってください。  
>  _hima **deshitara** , chotto tetsudatte kudasai_ (polite)

I myself would probably use the second one, although choosing between them
would depend on the situation.

We have a question explaining the differences between なら, ～たら and ～えば:
[Differences among -たら、なら、-んだったら、-えば,
etc](https://japanese.stackexchange.com/questions/393/differences-
among-%E3%81%9F%E3%82%89-%E3%81%AA%E3%82%89-%E3%82%93%E3%81%A0%E3%81%A3%E3%81%9F%E3%82%89-%E3%81%88%E3%81%B0-etc)

