Check my translation on this please...

[Diggity]

Taitei nanji kan gurai nemasu ka. - Usually, about how long do you sleep?

and...

Mainichi, nanji kan benkyou shimasu ka. - Everyday how long do you study?

I'm pretty sure I am reading this right but wanted to make sure as... sensei ga imasen yo! And I believe this is how I say I don't have a teacher.

Thanks!

[Kates]

Those sound good to me. But I'd appriciate a second opinion. ^_^
Another way to ask would be:
--nanji kara, nanji made-- (from what time to what time) if you want a more specific answer.

Taitei, nanji kara nanji made nemasu ka?


However... the 'sensei ga imasen' might be wrong. ^^; It really doesn't seem to imply that you lack someone to teach you Japanese... but sounds more general like "is no teacher." But... I could be off-base. ):

[Justin]

Yep, those translations look to be pretty on the spot if you ask me.

Kates wrote:
However... the 'sensei ga imasen' might be wrong. ^^; It really doesn't seem to imply that you lack someone to teach you Japanese... but sounds more general like "is no teacher." But... I could be off-base. ):

Maybe something like 'oshietekureru hito ha inai (kara)' would work better?

[Harisenbon]

I think 先生がいない is just fine, persoanlly. 教えてくれる人がいない would also be fine, but feels wordy.

I am kinda iffy about the 大抵. It may just be me, but it feels a little stiff. I would use だいたい or ふつうに instead. But that may just be my speaking patern. Grammatically, I believe it is correct.