句型转换。
1. I've been skating for one and a half years.(用since改写句子)
I've been skating _______and_______ _______．
2. They have been waiting for half a day.(改为一般疑问句)
_______ they_______ _______for half a day?
3. She is so upset that she can't believe anyone.(改为同义句)
She is_______ anyone.
4. I have been collecting stamps since 2 years ago.(对划线部分提问)
_______you been collecting stamps?
5. Please remember to post the letter for me.(改为同义句)
_______post the letter for me.
