Your sentence
아이들이+의자에+앉아+있어요.
Words in this sentence
아이
child, kid; Used to refer to objects, typically in casual but polite settings such as when persuading a customer to buy a product.; less colloquial form of 애 (ae, “guy; person”)
Noun
있다
to stay, remain in a location; to keep working for a company; to stay in a certain state; for time to pass; to be (in a state); to be in the process of; to maintain in the result of
Verb