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问题 时间段作主语时的主谓一致问题

...ur city. 谓语是have witnessed.为什么当句子是 Ten years is a long time 时把Ten years看作一个单数整体，谓语用is.而在 The last ten years 'have witnessed'  great changes in our city.这个句子中却不能用has witnessed?

问题 主句是过去进行时位于句末的when如何翻译

...见问题解答大词典(增订版)(赵振才)p1583：(A) I was just going when he came in. 我刚要走，他就进来了。(误译：他进来时我正要走)(B) I was cooking when she knocked at the door. 我正在做饭，突然听到他的敲门声。(误译：他敲门的时候我正在做饭)...

问题 yet的用法

When and where to build the new factory is not decided yet. 请问句中有yet为什么不能用has not decided呢？

问题 第三条件句的意思与but从句矛盾吗

Appian wrote that Hadrian, like Titus, destroyed Jerusalem, implying that there was something to demolish, and the rebels, sweeping all before them, would surely have besieged the Tenth Legion in the Citadel and worshipped on the Temple Mount if they had had the chance, but we do not know if they di...

问题 of短语作后置定语的名词前是否需要定冠词

They were talking about (the) pollution of the environment.请教老师，pollution的后面有定语of the environment, 所以pollution 前面需要加定冠词the吗？类似的句子，为何有时有the而有时没有？谢谢老师。

问题 从属连词和并列连词可以同时出现在一个句子中吗？

... went by bus,it would be cheaper but the train is quicker. If 从属连词引导we went by bus But是并列连词，所以It would be cheaper but the train is quicker. 这句本应该就是完整的一个句子了，还可以在句子前加if从属连词引导的句子吗？ 或者是因为if we w...

问题 宾语从句中had been和was不同时态的含义辨析

... as any of its kind in the world.主句had heard是过去完成时，宾语从句的时态应该至少不晚于主句的时态had heard, 那么为什么宾语从句仍然使用了it was一般过去时呢？We had all heard that it HAD BEEN a great dam - 可以这样说嘛？这里的宾语从句用w...

问题 until从句的主句疑惑

...often going late into the night 是动名词复合结构吗？2 until状语从句的主句是什么呢？是All councils made decisions on a consensus basis吗？

问题 when的用法疑问

When did you play basketball?when询问动作的时间还是提问者所关心的时间呢？

问题 现在分词lying用于名词前作定语的疑问

看到这样一个短语： lying smiles 假笑（来自牛津词典） 根据其翻译，这里的 lying 应该是 lie 的现在分词，好像从未见过类似的用法。能请哪位老师分析一下吗？谢谢！

问题 which在此处指代什么？

...the relevant field还是逗号前面整个句子呢？这里是非限制性定语从句吗？which修饰前面整个句子？

问题 分析句子结构

Nobody thought much would come of a nine-year-old's school project.我不确定这个句子的结构是从much到最后做宾语从句，还是much后面省略that，加上would到最后，做much的定语从句。麻烦大佬分析一下，多谢！

问题 句子成分分析(分词作定语)

...going into the next contests in the weeks ahead.我对这个现在分词作定语突然不是很理解：1)按照语法，现在分词作定语的逻辑主语是被修饰词，表示的含义是主动或进行，比如the boys playing there就是如此。但这个句子中，从语法上讲going短...

问题 what, who, which比较

...言习惯吗，我必须有一个一般疑问句在前面，或者说，这只能用于陈述语序，特殊疑问词不是已经有疑问的意味了吗，who came？虽然我这个对主语提问，为什么宾语就不可以呢？

问题 when在句子you told me stories of when you were small的用法

请教老师：怎样理解when在句中的用法You told me stories of when you were small.