my father and my mother have been married for30years,and never once-----with each othera have they quarreledb did they quarrel为什么不能选B 用过去时

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my father and my mother have been married for30years,and never once-----with each othera have they quarreledb did they quarrel为什么不能选B 用过去时
my father and my mother have been married for30years,and never once-----with each other
a have they quarreled
b did they quarrel
为什么不能选B 用过去时

my father and my mother have been married for30years,and never once-----with each othera have they quarreledb did they quarrel为什么不能选B 用过去时
never是表示否定的副词,放在句子前,所以整个句子要用部分倒装的形式.
前半句中出现了 for30years,表示这是一个持续性的状态,前面一句用的是完成时,表示动作持续到现在（他们的父母都没有吵过一次架）.
所以后句时态要和前句一致,也用完成时.所以整句话都要用完成时.他爸妈结婚30年,是指包括现在在内的30年,如果用b的过去式,就表示他爸妈过去不吵架,现在吵架了,那就不能用完成时了.
never once--have they quarreled---with each other.转换成原句是：
they have never quarreled with each other.
这里涉及到的一个知识点是：表示否定的副词（如句中的never,hardly,not only,nor,little,seldom,nowhere,not until,hardly…when,no sooner…than,by no means）放在句首时,需要部分倒装,部分倒装就是将句子的主语和谓语换一个位置就OK了.
这样说应该很清楚了.

有并列连词and,前面是完成时，后面一般也用完成时（一般情况）
这里，不是特殊情况，就用完成时，口语里也可以用过去式

have a quarrel 吵架固定

过去时只说明了过去的情况，与现在无关，而前面的句子用了现在完成时，and连接的句子要对等，用现在完成时与现在的时间就有关联了

就应该选B啊
就是要表示过去曾发生的动作，不强调对现在的影响，所以不该用现在完成时
你好好看看答案，是不是你看错了？

这句是现在完成时，后也应该是现在完成时。现在完成时'have+been(过去分词）''

前面有一个时间段30years，表示一个时间段的动作是有延续性的，所以要用完成时。还有一个判断标志是，这是一个and连接的并列句，所以事态要一致，前面是have been married ，后半句也要用相应的时态。
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A.
完成时表示从过去的现在都不曾，过去式表示过去不，但现在不一定哟。题意显然是前一种。
祝你学习进步，更上一层楼！ (*^__^*)
不明白的再问哟，请及时采纳，多谢！

他说的是这三十年以来这一段时期一直持续到现在都没吵过架这是很明显的完成时用法呼呼主要的答题线索在For 30years

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