had been和have been有什么区别?请举例

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hadbeen和havebeen有什么区别?请举例hadbeen和havebeen有什么区别?请举例hadbeen和havebeen有什么区别?请举例hadbeen是过去完成时结构:had+动词过去分

had been和have been有什么区别?请举例
had been和have been有什么区别?请举例

had been和have been有什么区别?请举例
had been是过去完成时结构:had+动词过去分词:表示两个事件中一个发生在前,或者说是表示较早的过去.
After they had entered the house,they went into the dining room.
他们进到屋里后,走进了饭厅.
have been是现在完成时结构:have/has+动词过去分词:单数第三人称用has,其余用have.表示在过去不确定的时间里发生的并与现在有着某种联系的动作;或者表示开始于过去并持续到现在的动作.
I've just had a cup.我刚喝了一杯.此处had为动词have(喝)的过去分词

had been是用在过去完成时,是指过去的过去,I had been in USA for 3 years since you left.
have been是用在现在完成时,是指到现在为止,I have been in USA for 3 years .

更正:
had been是用在过去完成时,是指过去的过去,I had been in USA for 3 years since you left.
have been是用在现在完成时,是指到现在为止,I have been in USA for 3 years .

时态不一样