I have not been back to Hong Kong.back to Hong Kong是什么句子成分?

I have not been back to Hong Kong.back to Hong Kong是什么句子成分? i have ___ been to Hong Kong. I have been to Hong Kong twice.(twice划线提问) hong kong came back to china fifteen years ago同义句hong kong _ Hong Kong came back to China July Lst ,1997. Hong kong came back China Today I've come back to Hong Kong to stand before you,and ac They have never been to hong kong改为肯定句 _ _ _ have you been to Hong Kong have you ever been to Hong Kong 作文60词 I wonder when she will be able to come back from hong kong GO TO HONG KONG