问题 more than后接动词是to do还是doing ?

这是教美式发音的美国老师说的：Now when you use it as a noun, "He's a crackup".It's more harsh than saying someone is mentally ill.请教老师：more than saying， 为什么不是more than to say 呢？

问题 alive可以用于名词前作定语吗

不是说 alive 不能用于名词前作定语的吗？但下面这句呢？为什么可以？The similarities between Mars and Earth were enough to keep alive hopes of some form of Martian life. 火星和地球之间的诸多相似处足以让人们对火星上存在某种生物抱以希望。

问题 tuck sb in/up的词典解释

牛津词典给出的解释是: to make sb feel comfortable in bed by pulling the covers up around them. 意为把...的被子掖好我想问下pull up这里应该怎么理解？pull是拉起来的意思，up作小品词可以理解为改善吗？

问题 still doing sth和still be doing

the company has a mechanical clock that is designed to still be marking time thousands of years hence.请问这里为啥是still be doing呀 谢谢老师

问题 that是引导词还是代词的辨别

People are invited to query Marilyn vos Savant, who at age 10 had tested at a mental level of someone about 23 years old; that gave her an IQ of 228 - the highest score ever recorded.这里的that是引导词还是代词呢？如果是引导词那么先行词是什么？

问题 数词做同位语的问题(both与two)

请问老师，你们俩 You two 和 You both 是否都正确？He put them both into his mouth. We both tried to get the coins.这两句话中的both可不可以都用two替换？

问题 介词+关系代词引导的定语从句

在介词+关系代词这种结构中，比如：He is the man on whom I think you can depend.该句中，“介词on+whom引导的宾语从句”作后置定语，换一种说法，是不是也可以讲“介词on+whom引导的宾语从句”所构成的定语从句？

问题 这些都是同位语吗（同位语和插入语的区别是什么）

...,特别是球类运动。 Some students, for example, John, live in the city.　有些学生，例如约翰吧，就住在城里。All the countries，big or small，are equal. 所有的国家，不分大小, 都是平等的。 He has read all kinds of books, ancient and mode...

问题 when, as, while, since的区别

_____ Tom waited for the exam result, he became less and less patient.  A. When    B. As      C. While   D. Since 答案为 B。请解释一下 when 与 as 的区别，谢谢！

问题 同一个句子三个that的作用

Although scientists have known for a long time that about 2% of people suffer from face - blindness, which means that they have huge problems recognising faces, they are only new realising that some people are the exact ones.这三个that的作用是什么呢？

问题 区分when引导定语从句和时间状语从句

Do you remember all those years when scientists argued that smoking would kill us but the doubters insisted that we didn't know for sure?这句话并不缺成分，为什么when引导的是定语从句而不是时间状语从句？

问题 something在这里怎么用？

Diet sodas, though they might come sugar- and calorie-free, are still sodas, something Americans are proving less and less interested in drinking.本句中something应导的红色部分，我感觉是状语，可以something在此时什么词性，是什么意思？其用法是什么呢？还可以...

问题 propose to do sth = propose doing sth ?

问题 stick to后面为什么要跟doing sth

问题 独立主格中可以用to have done这种结构吗