搜狗做题网__we are doing has never been done before
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__we are doing has never been done before
A that B what
A that B what
___we are doing has never been done before.
B,What 是正确答案
[What] we are doing has never been done before.✓这样的读法是正确的
[That] we are doing has never been done before.✗如果用'that’那么就不对了,如果在这个句子里加'subject‘（That subject we are doing has never been done before）,那么就对了.但是这个句子里无类似'subject’的词,因此我们不选A
为了完整了解,特地翻译成中文.以下是正确翻译：
我们正在做的事是以前从未做过的.
B,What 是正确答案
[What] we are doing has never been done before.✓这样的读法是正确的
[That] we are doing has never been done before.✗如果用'that’那么就不对了,如果在这个句子里加'subject‘（That subject we are doing has never been done before）,那么就对了.但是这个句子里无类似'subject’的词,因此我们不选A
为了完整了解,特地翻译成中文.以下是正确翻译：
我们正在做的事是以前从未做过的.
__we are doing has never been done before
has been doing have been done区别
has been doing还是 has done
My brother has never been abroad before
He has never been abroad before.这里的been是什么
America has never been about what can be done for
My brother has never been abroad before中为什么要用has never been
解释句子成分:My brother has never been abroad before."
Mrs.green has never been to shanghai before 一般疑问句
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He has never been to see a clairvoyant before.