Definition
particle
(interrogative particle) introduces a yes-no question
“Ĉu neĝas hodiaŭ?”
whether, if
“Mi ne certas, ĉu li amas min.”
Transforms a sentence into a tag question or similar when added to the end of a sentence
“Vi ne manĝas viandon, ĉu.”
whether ... or
interjection
An expression of surprise or disbelief; really, what, is that so
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