问题描述：
it would be many years until Australia learnt to respect Aborigines.
这句句子里是it is until
那比如说it isn't until 12 o'clock that he do sth.
这里为什么又是it isn't until?
这样两个句型有什么区别呢?能不能说详细点,最好举例子,
这句句子里是it is until
那比如说it isn't until 12 o'clock that he do sth.
这里为什么又是it isn't until?
这样两个句型有什么区别呢?能不能说详细点,最好举例子,
问题解答：
我来补答展开全文阅读