why don't you -- in questions why you don't -- in messages

"Why you don't..."不是问题。 比如： "Why don't you eat something?" - 对 “Why you don't eat something?" - 不对 "Why aren't you eating?" - 对 “Why you aren't eating?" - 不对 "I don't understand why you aren't eating." - 对 "I don't understand why aren't you eating." - 不对 "Why are you here?" - 对 "Why you are here?" - 不对 "I don't know why you are here." - 对 "I don't know why are you here." - 不对 “When will you come to Australia?" - 对 "When you will come to Australia?" - 不对 "I want to know when you will come to Australia." - 对 "I want to know when will you come to Australia." - 不对 "What do you see?" - 对 “What you do see?" - 不对 "Tell me what you (do) see." - 对 "Tell me what do you see." - 不对