问题 such that和as 用法理解

...来判断理解，对吗？3）Ask your aging parent questions about such things as lottery entries and contests.这句中的such是限定词，限定修饰things，传统语法认为as 引导了定语从句，现代语法认为as引导了比较分句。问题是: 传统语法认为as 引导了定...

问题 为什么用过去完成时态

... Hubei provinces are almost done, while in Anhui province about 90 percent have been completed and in Henan province 80 percent have been finished. In Shandong and Shaanxi provinces, harvests are nearing their peak.Taking up about a quarter of the country's total annual grain output, the harvest is ...

问题 upside down是修饰名词还是动词

..., so I wrote the first two parts at a leisurely pace, using a felt-tip pen that glided smoothly across the paper, and then typed out the last part holding two ballpoint pens upside down," she said. 这句话的upside down是修饰hold还是pens是颠倒的握着圆珠笔，还是颠倒的圆珠笔...

问题 have done可以和哪些情态动词组合，意思各有什么不同？

（ ）have done sth（can,could,will,would, shall,should ,may might, must,need..）这些都可以搭配吗？能请老师归纳一下，它们搭配have done时，所表达的意思上的差异吗？

问题 现在完成时和现在完成进行时区分含义？

I have been calling on Mortimer, and he pointed you out to me from the window of his surgery as you passed. As our road lay the same way I thought that I would overtake you and introduce myself. I trust that Sir Henry is none the worse for his journey上句，I have called on Mortimer 可...

问题 have+done可以表示行动前的一个行为吗

请问一下。Early in the morning,having assembled outside the school gate,we headed straight to the destination.为什么要去having,have done不可以表示先集合再出发吗？谢谢了！

问题 删除being会给句意带来什么变化

Immediately below, a rectangle of identical size and proportion contains two scenes, the one to the left being almost two and a half times as large as the other.引文中的being一旦删除，成为无动词分句，会带来句意的什么样的变化？

问题 复合关系代词what理解问题

章振邦新编高级英语语法330-331页：说what=that which/the thing that.What remains (=That which remains) in our memories is his courage and undauntedness.好像记得语法网老师说过：复合关系代词what=the thing which 或 the thing that，但为什么书上说=that which呢？...

文章 have to表示推测意义的用法

“have to” is used to say that something is very likely. (“have to”可以用来表示“很可能”、“肯定”的意思。)It has to be close to noon. 肯定快到中午了。（《韦氏高阶英汉双解词典》p.972）There has to be some mistake. 肯定是出了差错。（同上）...

话题 forget to have done

话题 couldn't have done

话题 are to have done

话题 hoped to have done

话题 would rather have done

问题 情态动词+have done后的附加疑问句

对于 need / may / might / can / could / should + have done 结构，后面的反义疑问句附加部分怎么办？He could have helped me (yesterday),_______? A. haven't heB. didn't heYou should have done it, ________?There may be a mistake, _______ isn't there?学生想就此...