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S

5.4 Question

Yes/no questions are formed by putting the particle Ĉu at the beginning of indicative sentences:
Ĉu vi havas domon?Do you have a house?

Question-word questions are created by using an interrogative correlative:
Kion vi faras?What do you do?
Kiu estas tiu?Who is that?
Kiam vi alvenas?When do you arrive?