作业帮he___the display for several mimutes before re-entering his shop.a) was gazing at b) gazed at c) had gazed at d) had been gazing at选择哪一个,及为什么
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he___the display for several mimutes before re-entering his shop.a) was gazing at b) gazed at c) had gazed at d) had been gazing at选择哪一个,及为什么
he___the display for several mimutes before re-entering his shop.
a) was gazing at
b) gazed at
c) had gazed at
d) had been gazing at
选择哪一个,及为什么
he___the display for several mimutes before re-entering his shop.a) was gazing at b) gazed at c) had gazed at d) had been gazing at选择哪一个,及为什么
选B
因为从句中省略了主语和谓语,过去完成时通常都要和一般过去式形成对比.从句是re-entering,没有表现出过去时的用法,因此前面不宜使用过去完成时.
选择C
是过去完成时，在before之前是发生在过去的过去的一件事
一般过去完成时由before引导
亲，好的话就采纳吧
b
在...之前做过什么,过去时态
nihao.从广义上说，B和C都是正确的选项，这两个选项不应该放在一起。原理是：这是以讲故事的形式来叙述过去发生的事情。“一般过去时”是最好的选项。
选【D. had been gazing at】
关键词在于“for several mimutes”，表示动词持续了一段时间，所以要用完成时，那么我们就可以直接踢掉A和B选项了。
(要用A或B的话，句子改为类似He was gazing at the display when someone entered his shop. 才行。）
至于在C和D之间选，其实如果没有D...
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选【D. had been gazing at】
关键词在于“for several mimutes”，表示动词持续了一段时间，所以要用完成时，那么我们就可以直接踢掉A和B选项了。
(要用A或B的话，句子改为类似He was gazing at the display when someone entered his shop. 才行。）
至于在C和D之间选，其实如果没有D选项的话，C选项也不算错。关键是，D选项比C更恰当。
D选项是“过去完成进行时”。至于为什么，解释起来实在太麻烦，你直接搜索这个时态，看它的用法就明白了。
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