had been和have been有什么区别?请举例
来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/10/06 21:57:58
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
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
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