"When are people happy?"

Translation: 사람들은 언제 행복합니까?

[Spaqin]

When they are explained grammar.

[josueetcom]

I can explain this! In Korean (also in many other languages) a question can often be structure the same way the answer is with minor changes (~ㅂ니다 -> ~ㅂ니까 in this case). In English the answer to When are people happy? is of the format People are happy when.... Thus, the question in Korean can be constructed with the rearranged English question People are happy when? in mind. 사람들 is the topic, 행복하다 is the verb and 언제 is an adverb. Since Korean syntax for a sentence is usually (topic) (adverb) (verb), we get the question 사람들은 언제 행복합니까?.

[FirdausJuzup]

Perfectly explained. It the same pattern if subject/object (가/이) involved. Subject-Object-Verb (SOV)

[PALewis88]

When they have a purpose.

[conniestar16]

When they are satisfied with themselves.

[MelisaWija3]

When they are not told that the dog and the cat conversing in Korean

[JVLS23]

Ok emo corner

[DidYouGetAWopper]

Lmao

[NineTreasure]

Never..

[hayliiiiiiin]

Duolingo out here asking the real questions

[A13xxa]

dEeP

[FatmaFakhry]

When they have money

[BeckyBeez99]

Is there a reason why 언제 can't come first?

[DrMicroChem]

Josueetcom's answer in this thread is a really good explanation of why

[harshavi18]

Sorry duo ,but the truth is that ,people are never happy :_)

[Serenity_17]

People become happy when they are aware that they have something that satisfies and exhilarates them—something that pleases their interests. This is my succinct answer.