可以.
it is how long that i dont know he has stayed here第二个问题你和我想的一样,但是答案给的:I don't know how long it is that he has stayed here .不过还是 多谢你肯回答在这里强调句的形式是how + 形容词+ it is 因此答案是I don't know how long it is that he has stayed here .不过我觉得其实都得可以的...how + 形容词+ it is这个不是感叹句吗,感叹句也算强调句?这是对强调句中特殊疑问词考法.在这种题目中要注意词序,即特殊疑问词要置于句首或在宾语从句中居首,而且这里不是单独出现how + 形容词+ it is,在这里how后面跟从句作为宾语成分,是how引导的宾语从句..不是感叹句..