Especially since duolingo seems to endorse asking questions in French by inflection as opposed to the grammar changes that Anine and Sitesurf suggested above? Seems inconsistent. Is it because of the Quand?

This is what I wrote and Duo marked it wrong. I understand that 'promene-je' may be more typical, but until now Duo has also allowed questions using the subject-verb construction. Sitesurf?

It is a rare construction, for euphony (pronunciation) reasons. anyway, it does exist and the rule is that the French skips the first grave accent and adds an acute accent on the last "e", to ease enunciation: "quand promené-je mon chien ?" (sounds almost like the imparfait tense: quand promenais-je mon chien ?)

Academically speaking, you should avoid having two interrogative words at the beginning of a question. However, it is very common, in particular with "je" and verbs of the 1st group, because of he weird form "promené-je" that you would have to use with "quand" alone, in the formal speech.

• quand promené-je mon chien ? (skip the accent on the 1st -e and add an acute accent on the last one, in order to make it sound properly).

• quand promènes-tu ton chien ? (no issue with the sound)

• quand promène-t-il/elle son chien (addition of -t- to avoid misleading 'promènil' or 'promènelle')

• quand promenons-nous notre chien ? (grave accent disappears)

• quand promenez-vous votre chien ? (grave accent disappears)

• quand promènent-ils/elles leur chien ? (no issue with the sound with the T liaison)

It is grammatically correct to say that; however, unless the female-ness of the dog is essential to the clarity of the sentence, I've been lead to understand that you would use "mon chien," because "la chienne," as with the English equivalent, has come to be used primarily as nasty slang for a woman one dislikes or derides. (The same logic apparently works with cats - it's le chat unless you absolutely have to feminize it, as la chatte is slang for female genitalia. There's a nice thread entitled "Beware of Double Meanings" in the "Animals" lesson earlier on that addresses these issues.)

If, however, you're writing misogynistic rap lyrics in French, and need to ask when you take your ❤❤❤❤❤ for a walk, that is the right way...

(many apologies if this is an old comment - but for future readers, I think reiterating "beware of double meanings" as often as possible is worthwhile.)

I think it would be acceptable.

I think if you want to put "quand" at the end of the sentence, you would not use "est-ce que". It would be: Je promène mon chien quand ? Correct me if I was wrong.

Unfortunately, it is wrong.

Either "je me promène" = I walk myself or "je promène le chien" = I walk the dog.

stressed pronouns can be used in inversions but only as objects:

• "promène-moi !" would be imperative and mean "walk me!" (your dog talking to you!)

stressed pronouns can be used as subjects, but only as multiple subjects of the same verb:

• "toi et moi allons nous promener" = you and I are going for a walk

It is from the relaxed register, not totally wrong but unusual since the real purpose of the question is at the end of the sentence. However, it is acceptable.

Verb "marcher" is intransitive in French: it cannot have a direct object.

walk the dog = promener le chien