"When do those people eat?"

Translation: वे लोग कब खाते हैं?

[Tanloves2learn]

What is the difference between 'kab' and 'kabhi'?

[apubhadaram]

कब makes a question. Just like क्या or कैनसी. It means "when". For example: तुम कब पढ़ते हो? "When do you read/study?"

कभी determines the frequency of the occurence of an event. It has different forms/variations. For ex:
कभी कभी (sometimes) - मैं कभी-कभी सड़क पर दौड़ता हूं "I sometimes run on the road"
कभी नहीं (never) - मैं सुबह कभी नहीं सोता "I never sleep in the morning"

I hope it helps :D

[Gili838461]

I see the word "when" has more options: kab, jab and tab. What sre the differences?

[Ceiled]

कब is a question word, you use it when you expect an answer.

जब/तब mean "when/then" and are used to talk about a specific time or occurrence. The difference can be a bit hard for an English speaker to wrap their head around because English uses the same word for both.

Some examples:
"When (कब) will you get home?"
"When (जब) you get home, then (तब) please take out the trash."