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had been只是is的过去完成时么?怎么把 It had been a good day 改成疑问句?have be

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had been只是is的过去完成时么?怎么把 It had been a good day 改成疑问句?have been to 是不是固定搭
I have been to the US.意思是我去过美国.这句话是现在完成时态,可是改成一般现在时就变成了 I is to the US.感觉好奇怪.
I have been a good boy.意思是我曾经是个好男孩,改成一般现在时是 I am a good boy.
却没有问题.
都是I have been 为什么一个可以改成现在时,一个不可以?是have been to是固定用法 还是be to,或者2者都不是固定搭配!
had been只是is的过去完成时么?怎么把 It had been a good day 改成疑问句?have be
had been只是be[系动词是]的过去完成时.It had been a good day 改成疑问句had it been a good day?
have been to 是固定搭配,表示曾经去过某地.【不能直接变成一般现在时态】
have/had + been/be? It had been a very strange day. have/had + been/be的区别是什么? had done 是过去完成时,have done是现在完成时,那have been和had been呢?be不是动词呀 will,will be,had been,have been There had been a party 怎么改成一般疑问句和特殊疑问句 、 have been I have been a doctor before.I had been a doctor be If the flower had been watered,it __as it is.A.wouldn't be B it have been necessary 和 it is necessary 的区别?请问下句中it had bee have been 与had been 过去完成时的问题It had been wrapped up in newspaper and it contained have been / has been / had been 的区别