问题 不定式做后置定语介词的省略

The place to stay (in) is the university guest house.这句话中为什么stay后面可以省略in? 同样，The time to shoot (at) is midnight为什么也可以省略at?

问题 by the time加过去完成式的疑问

By the time he had fixed the leak, I was into him for$ 500.请教老师，这句话为什么用过去完成时，一般都是过去时

问题 后置定语还是省略了中心词的同位语

undercover investigators were able to sneak weapons—both fake and real— past airport security nearly every time they tried.fake and real是后置定语还是说是省略了weapon的同位语？

问题 be curious 后的从句用陈述语气还虚拟语气

请问：curious 后的从句用陈述语气还虚拟语气？若可用虚拟语气，那该虚拟语气的是怎样构成的？用过去式还是用should+动词原形？谢谢！

问题 It's time to get up中的不定式to get up是什么成分

It's time to get up中的不定式to get up是什么成分？这个to get up是time的定语还是补语？解释为是起床的时间了还是解释为是时间去起床了？或者还是to get up做句子的真正主语后置。

问题 作定语用 best known 还是 best-known（要不要连字符）

...）阅读理解A中的句子。这里的 best known 是用于名词前作定语，但我记得有书上说过，best-known 用于名词前作定语时必须要用连字符，但用作表语时，则可以省略连字符。但这道高考题怎么没有用连字符呢？是漏印了吗？

问题 从句类型判断

...re you know the other person is right yet you cannot agree with him? 请问定语从句中you know是插入语吗？理解成宾语从句是不是更好？谢谢

问题 It’s time I were in bed错了

有本书上说：It’s time I were in bed 是错的，应改成：It’s time I was in bed.虚拟语气中用were错了？请看：If I were you, I would stay at home. 像这样用were不是很正常吗？

问题 what从句前到底是用because还是because of

老师说，because 是从属连词，它用于引导原因状语从句。如：You must make allowances for him because he has been ill. 你应该体谅他, 因为他一直病着。The company went bankrupt because it couldn’t sell its products. 那家公司因产品滞销而破产。John did not...

问题 as从句的疑问

（1）This is one the most famous tourist sights in my hometown, the Porcelain House, or, as how we call it, the China House. 请问这里的as how we call it应该怎么理解呢？对不对呢？how应该是不能引导名词性关系分句的，所以as应该不能理解as为like然后后面是...

问题 a metal framework(为啥用不定冠词)

The actual figure was made of copper supported by a metal framework which had been especially constructed by Eiffel.请问老师，为啥用不定冠词a metal framework，我觉得应该用定冠词the metal framework，因为这个名词被定语从句修饰了。

问题 定语从句

but current studies are begainning to place greater emphasis on the conditions under which we forget.想问一下，这个under which 如何理解？

话题 非限制性定语从句存疑

话题 省略，定语从句，why+动词原形

话题 插入语位于定语从句中