Is "Je sais que quand" (I know when) grammatically correct?
or is it
"Je sais quand".

Explanation:

Bonjour,

Les 2, selon le contexte:

Je sais que quand tu arrives, il faut fermer les placards.

Je sais quand tu arrives au bruit de la voiture .

Bonjour,

Les deux sont corrects.

Exemples :

Je sais que quand je vais chez ma grand-mère je suis très heureuse.

"Je sais quand" il va venir chez moi.

answer:

where is the musée d'orsay? to lyon in paris in the suburbs 2. what was it originally? it was a station. it was a theater. it was a museum. 3. in what year is the building inaugurated? in 1939 in 1900 in 1986 4. who was his architect? orsay orson welles victor laloux 5. in what year is the building transformed into a museum? in 1986 in 1900 in 1939 6. in which art is the museum mainly dedicated? to nineteenth-century art to impressionist art to twentieth-century art

answer: frenchlearn.com

explanation: because that's how i learned french.