句型转换 十万火急

where have they gone?
I have had (the) bike since ten years ago.

where have gone
have bought

对地点提问用where 原句用什么事态疑问句就用什么事态，疑问相当于倒装， they have gone 就要改成have they gone 所以第一句答案是：where have , gone.
原句是一般过去时，如果用since改写，就是 have had，有since可以用现在完成时，而bought只是瞬间，无法表达永久持续的意义，要用have，have有要给写成过去分词即had。所以第二句答案是have had。

(*^__^*)...嘻嘻，童鞋好，姐姐我叫 疯言疯语哦
http://hi.baidu.com/%B5%AD%C4%AB%D0%C4%C7%E7

Where have they gone?

I have had bike since ten years ago.
得知此句的时态为现在完成时，而bought 为瞬间动词而现在完成时只能与延续性动词连用，所以应该改为延续性动词，故为had