-ています / present continuous form not used in habitual action


I have read this sentence in my book :

> 山田{やまだ}さんは毎朝{まいあさ}６時{じ}に **起きます{おきます}** 。

  * Why isn't the present continuous used ( **起きています** ) since it is obviously a habit for Yamada-san to wake up at 6 every morning?

  * Is it because we already have 毎朝 in the sentence? But then, would it mean that the `-ます form` is prefered over the `-ています form` if the meaning of a sentence is clear enough?

  * Then, does it sound weird to use the `present continuous` in that kind of sentences?

  * If my assumption is wrong, what is the difference between this sentence and the same one with `-ています form`?

* * *

**To go further…**

Could this sentence be translated to future as:

> Mr Yamada will get up at 6 every morning.

Does it depend only on context or would we need to add some words to make sure
we understand it as future tense?

* * *

**Ressources**

  * Wasabi-jpn.com ["Customary Actions: the Plain Form VS. the Te-form + いる"](https://www.wasabi-jpn.com/japanese-grammar/present-progressive-tense-resultant-states-with-te-form/#4)

  * From another book:

> The -ています form can also be used to express a customary and repeated action
> that takes place through a certain period of time.
>
> _Examples:_
>

>> ぎんこうにつとめています。 I work in a bank.

>>

>> あねは英語{えいご}の先生{せんせい}をしています。 My sister is an English teacher.




Using ている form for habitual actions, compared with the one without it, implies
that the speaker is to some extent conscious of period that the habitual
action continues for.

In other words, 山田さんは毎朝６時に起きている implies that the speaker is conscious that
Yamada wouldn't necessarily get up at 6 in past, and won't necessarily keep
his habit forever.

So, the reason why it doesn't use ている form is that the speaker is not
particularly conscious of sense of period as mentioned above.

In this regard, it sounds too fatal to apply permanent action, namely,
habitual one without ている to what's generally introduced as examples of
habitual actions in textbooks e.g. 学校へ通っている or 店で働いている.

When you consider an example like 人は空気を吸う, you won't really wonder why it's
not ている, will you? 毎朝起きる is kinda in-between, but at least, it's not unnatural
to use permanent action.




Using ている form for habitual actions, compared with the one without it, implies
that the speaker is to some extent conscious of period that the habitual
action continues for.

In other words, 山田さんは毎朝６時に起きている implies that the speaker is conscious that
Yamada wouldn't necessarily get up at 6 in past, and won't necessarily keep
his habit forever.

So, the reason why it doesn't use ている form is that the speaker is not
particularly conscious of sense of period as mentioned above.

In this regard, it sounds too fatal to apply permanent action, namely,
habitual one without ている to what's generally introduced as examples of
habitual actions in textbooks e.g. 学校へ通っている or 店で働いている.

When you consider an example like 人は空気を吸う, you won't really wonder why it's
not ている, will you? 毎朝起きる is kinda in-between, but at least, it's not unnatural
to use permanent action.

