The city at one time must have been prosperous, for it enjoyed a high level of civilization.想问下这句话中at one time 都可以放在句子的什么位置，可以放在been之后吗？还有must have been 是推测的用法吗，可以详细解释一下吗，谢谢~
...ontroversial encounters between police and African American civilians.Some of the demonstrations were peaceful.Some were violent with cars and buildings being damaged and stores being looted.请教老师：with cars and buildings being damaged and stores being looted. 中的2处being可否去除？...
原句：That is when U.S.
health officials ordered people to stay home to help stop the spread of the
coronavirus.请问老师，问：1. 句子开头That is when这是什么用法？属于什么从句？2. ordered...to stay home to help stop.....这里连用了两个不定式，分别是作什么...
...now better,” or “they see
the bigger picture,” were the catchphrases of my seasoned colleagues. 这是俄罗斯前外交官Boris Bondarev在《经济学人》应邀专栏写的一篇文章中的一句话。用were是因为语义一致的缘故吗？另外，两个逗号应该在引号的外面...
...ng.请问老师，这里的 non-finite clause 是否为internal complement of the VP?We hadn't counted on his being so insensitive.根据，剑桥学生语法书，这里的加粗字是 PP complement headed by on.另外，第一句中 Lisa 是否为 raised object？感谢老师答疑！
...t can loosely be described as travel that takes place at regular intervals-often in an annual cycle-that may involve many members of a species, and is rewarded only after a long journey.这句话破折号那一截是插入语吗，修饰intervals？起强调作用？另后面的that定语从句修...
...少见I think your idea的用法？老师说“think+从句”、“think of +词和词组”我也一直当固定用法记忆，那么“I think your idea”是否正确？4.在新概念2册中【_______him a few words of ltalian?The waiter. A.Who taught B.Who did teach】我选择B。正确...
...ance!! A dreadful attack happened in Paris and we pray for all the victims of this attack, the families, all those affected, and to France.疑问：the families, all those affected，这个做的是插入语和独立主格么？后面的and to france又是什么用法呢？
I have found a mobile phone . Do you know ( )?A.who the phone belonged toB.who is the owner of the phoneC.who the phone belongs to请问老师哪个是正确的呢？答案给了B，我感觉AC也说得通啊。谢谢老师指点。
...ee two workers who,between them,have just finished cutting three cartloads of gloden brown macaroni stalks.(本句的插入语为between them，按理说应该在助动词have后，为什么没在呢？)请老师解答下关于插入语的位置问题，同时，插入语前后是否一定要加逗...
... piano standing against the wall. 靠墙有一架钢琴。There’re a lot of difficulties facing us. 我们面临着很多困难。There is a door leading to the garden. 有一座门通往花园。 或者说：如何判别<现在分词>是作<定语>还是<补足语>?
尊敬的老师：您好！请教一下。McGee says leaving without a position lined up gave him time to reflect on what kind of company he wanted to run.在上面那句话中，without a position lined up 作什么成分？
...一句话：After 30 years, the EPA can point to progress against a number of environmental threats. 请问这句话里的 progress 是抽象名词吗？请问在它的前面可不可以加定冠词 the 呢？是不是抽象名词在任何情况下都不可以加定冠词呢？按照我的理...
...研英语某篇阅读题的答题选项）：We learn from the beginning of the passage that Web business tried but in vain to control the market.【参考译文】我们从文章开始部分了解到网络商务企图控制市场，但徒劳无功。【我的疑问】in vain 是介词短词作状...
One of the 23 with the myth is that it can prevent those who do not match the stereotype from 24 they have an eating disorder.23. A. projects B. problems C. proposals ...