第1个回答 2007-12-15
I cannot remember how mangy times I have come.
第2个回答 2007-12-15
I don't remember how many times that I came
第3个回答 2007-12-15
I don't remember that how many times i have been here
第4个回答 2007-12-15
应该后面的从句用现在完成时
第5个回答 2007-12-15
可以
自己认为对就行