In which context is the phrase used?

- Я не хочу здесь сидеть. -Что ты? - Ой, Господи... Что ты? It is something like "What's wrong?" "Why?" "What's happened with you?"

"- Ой, Господи... Что ты?" Usually old women can speak like that. But in the fact it sounds not like a question. "Что ты!" About your first example I don't know what I can say, because you wrote it like a dialogue. if it would be one sentence, then it would be the same. - Я не хочу здесь сидеть. Что ты?! Что ты?! = man's way to say it = Why are you suggesting me bul...t!?

Hi How are you doing am Lisa. and interest me to write you. you can write me at my email [email protected] so i can send you my photos Also tell you more about myself.

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