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问题 这个句子里的 that what 怎么理解

They could miss out on the chance to try again and realize that what once seemed impossible is now within reach.that是代词吗？是is now within reach的主语吗？还有what引导的这一队，它们的作用是说明that的内容吗？麻烦老师了，谢谢

问题 为什么用过去进行时与过去完成时

Susan decided not to write her resignation in the office because she didn't want her colleagues to know what she was doing?请问老师为啥要用was doing而不是had done?

问题 learn to do还是learn how to do

As time passed, people learned to accept the changes.请问这个句子中不定式前可以加上 how 吗？

问题 There be+名词+to do还是现在分词

There are no teachers ______ the students to give up their studies.横线上到底是填to allow还是 allowing呢 there be结构中后面加不定式和现在分词又有什么区别呢？

问题 现在完成时还是一般过去时？

辅导班的一道题： The windows are closed. Who ________ them？ A. close  B. closed  C. is closing  D. has closed. 老师说答案为D 。我觉得选B未尝不可，因为，前一句已经说了窗户现在是关着的。后一句只问过去谁把窗户打开即可...

问题 以 -ist 结尾的形容词有哪些

The pressure on companies from activist shareholders continues to grow. 激进投资人对公司的压力正与日俱增。一般以ist结尾的是名词，今天看到一个句子有activist shareholders。以为是名词定语，结果发现activist还是形容词。那么以ist结尾还是...

问题 to hear an interesting speaker做什么成分

Local colleges often welcome the public to hear an interesting speaker.我觉得public和不定式之间有主谓关系，可以看成是宾语补足语。也可以看成是定语修饰public.请问可否这样理解

问题 It's strange to do.....是什么句子结构？

原句是It may seem strange to put an industrial revolution and two political revolutions into the same packet.请详细分析各部分成分

问题 主语和补足语(表语）在数方面的一致性问题

有道词典上面转录朗文里面的例句。Hollywood movies are seen as an opiate for the people. 这里面主语和它的补足语，在数量上不一致，是不是有问题？

问题 journey times（旅行时间）为什么要用复数

Journey times will be very much reduced by the new road.  走这条新路，旅行的时间会缩短很多。这里的 time 是表示时间吧，为什么要用复数呢？

问题 there's been impressive为什么用been

The aid agency points out that there's been impressive economic growth over twodecades.老师,there be句型里用been是什么句型?

问题 请问这句话中 underway 应该怎么用语法解释

这句话是There are some efforts underway to turn the trend around. 我查了牛津字典，underway 被标注了名词前不可用。那么这句话中underway 是作efforts的后置定语吗，还是there be 句型的某种用法？

问题 句子分析（while引导省略的状语从句）

...fers useful lessons for agriculture and food policymakers worldwide." says the bank's Juergen Voegele.这句话的句子成分是怎样的？while究竟是干啥的？如果说while引导了一个省略状语从句，那主句又在哪里？

问题 so…that…的that引导结果状语从句还是宾语从句

So delighted to learn from your last letter that you are interested in the Spring Festival.求that引导结果状语从句还是宾语从句？

问题 upon在这里等于on吗

人教版必修一补充阅读里的句子：Strong winds blew upon the unlucky city and those whose homes had once stood in its green hills.请问句子里的upon能替换成on吗？我觉得不能替换，因为on是表示在“与物体接触的表面上”；但是不能替换的话，这里是u...