问题描述：
英语的几个问题.
1.Never before has he failed to live up to what his parents expect of him more than it is today 这句话的意思是?
2.-Have you been to the United States?
- Yes,only once.I (stayed) there only for seven days
请问括号里可以用have stayed么,为什么?
1.Never before has he failed to live up to what his parents expect of him more than it is today 这句话的意思是?
2.-Have you been to the United States?
- Yes,only once.I (stayed) there only for seven days
请问括号里可以用have stayed么,为什么?
问题解答：
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