Ask and answer.
Has he done his homework yet? - No, he hasn't. He still hasn't done his homework. / He hasn't done his homework yet.
Ask and answer.
Has she tidied up her room yet?-No, she hasn.t She still hasn't tidied up her room. She hasn't started yet.
Ask and answer.
Has she woken up yet? - No, she hasn't. She still hasn't woken up. / She hasn't woken up yet.