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问题 Would have done结构的用法

...思一样吗？3, 章振邦，新编高级英语语法195页If I had won the lottery, I would have bought a yacht next year.请问里面完成体（Would have bought.）换成不定式的一般体Would buy可以吗？含义有没有差别？

问题 过去分词done与现在分词的被动完成式having been done有何区别

非谓语动词中，过去分词done与现在分词的被动完成式having been done有何区别？例如这句话中： Heated, the metal expands. 能不能说having been heated 不是都表先后发生，且是被动吗？

问题 引导时间状语是By time 和when 中的主语的用法

...来时，现在完成时表将来完成时。例如在两个例子中1.By the time he retires,Stewart will have worked in this company for more than thirty years. 在这个句子中可以用has worked吗？2.Ask her to come and see me when she has finished her work. 

问题 关于in with by作“用”的用法问题

...或者具体的方式和手段用in来表达。譬如：we will send out the report in separate email.（如果in后面接方式或者手段则要加限定词或者形容词吗？比如in an email）cut with knife。(为何这里不用加限定词？）他们三者之间是否可以互换？

问题 notice sb do sth 与 notice sb doing sth 的区别与比较

您好，请教一道题。 Did you notice volunteers _______(help) a man cross the street ? 答案给的是help，为什么不是helping呢？[抱拳][汗]

问题 关于“，”和“not”

老师您好，It's actually a cat,not a dog.我的疑问是这里“not”做副词，中间的“，”如何理解呢？盼复！

问题 句子成分分析

And what wonderful adventures we shall have now that we’re all in it togetherThat从句是什么成分

问题 请问这句哪错了？

Despite it was raining, we ate outdoors.

问题 still的用法

You had difficulties, still you could have done it better.still为副词，前面为逗号的前提下，可以这样用吗？

问题 直接引语引述句的主语是代名词时能否倒装

“12 gold pieces, only 12 gold pieces,” calls out the man.这是直接引句的倒装，动词放在主词前面。没有问题。Off they went. (他们走了). 主词为代名词，不能倒装为: Off went they. (误)问题: “20 gold pieces for a turkey! Are you crazy?” they all say.这个...

问题 may as well与might well的用法区别

Your girlfriend looks quite upset, you _______ tell her the truth.A. may as well            B. have betterC. might well               D. needn't to老师，请问这题是...

问题 引导定语从句的by which time可以换成in which吗

The next Olympic Games are in two years, ________ I will be a university student.答案是 by which time。我想问：可以用 in which 吗？which 作关系代词指代先行词 two years. I will be a university student in which(two years).

问题 have a key to do sth（不定式是状语还是定语）

I have a key to open the door. 1. 这句话不定式如果理解为定语的话，后面是不是应该加一个with？ 2. 如果不加介词的话，应该理解为目的状语，但是静态动词后面可以跟目的状语吗？ 谢谢!

问题 辞书质疑(35)：《英语常见问题解答大辞典》关于lit不能用作定语

...，就有用 lit 作定语的用例，参见该词典的COLLOCATIONS FROM THE ENTRY：对于这个问题，各位老师怎么看？

问题 不理解词典解释中对by a doctor的解释

 If a person who is ill is referred to a hospital or a specialist, they are sent there by a doctor in order to be treated. 把…送往 [usu passive]这句话中的by a doctor是说是医生把病人送到医院的么？也就是说be referred to只能指医生把病人送...