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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inflict该怎么理解

...受的意思,那么如果要表达某人遭受了什么应该用could be inflicted啊

问题 现在分词被动式

...了出来。那么如果这个句子改为The tiger escaped from the zoo, being frightened by the humans.这句话可不可以理解为结果状语——老虎从动物园跑了出来，结果受到人类的惊吓。或者这个句子既可以理解为原因状语又可以理解为结果状语?需...

问题 请教大神，这个主从复合句该怎么分析

...分析provide在句中做状语吗Several layer count configurations may be implemented on the platform, provided the trace geometries of the individual microstrip and stripline routing layers fall within theparameter value ranges and the impedance specifications are met

问题 词法问题

The big question remaining，though，is for how long？请问老师这个remaining为啥不是被动。

问题 请问比较级可以做状语吗？

请问比较级可以做状语吗？比如这个算吗？Why did we not find it sooner？sooner 状语是吗？

问题 headed的用法

Margie even wrote about it that night in her diary. On the page headed May 17, 2157, she wrote, "Today, Tommy found a real book!"headed是过去分词做定语吗？是被标注的意思还是在顶端的意思

问题 句子成分

各位老师好，想请教一下下面宾语从句中，in space-time做什么成分，是修饰where的么？谢谢。It assumes the strong equivalence priciple, which states that the laws of gravity should act the same, regardless of where in space-time they are tested.

问题 请问此处like是作介词吗

It's like a symbolic gesture请问此处like是作介词吗like a symbolic gesture 作为表语

问题 句子改错with和as

改错：With a country develops, its cities become the engines of development.老师好！答案是把with改成as, 可以把develops改成developing吗？

问题 here前可以加介词吗

求问：here是副词为什么前面还加了介词in呢？（牛津高阶词典中例句如下：）It’s like a furnace (＝ very hot) in here.

问题 without可连用虚拟语气吗

Without her interference, it would have worked very well.这里的句子用的是虚拟语气吧？这是不是意味着介词 without 也可以连用虚拟语气？

问题 不定冠词用法分析（a piece of cake）

I want a piece of cake.不定冠词 a 是限定 piece 呢，还是限定 piece of cake 这个整体？期待老师的精彩解答。

问题 比较级的构词

...一个辅音字母，须双写这个辅音字母，再加-er。比如：bigger、hotter。但是great同样满足：闭音节单音节，末尾只有一个辅音字母，为什么比较级不双写t.2.比较级的构词规则：以辅音加y结尾的双音节词，变y为i，加er。比如：earlier...

问题 not...until能否与延续性动词一起使用

...night. They should rest early.You shouldn't wait until the last minute to study for a test.not...until 中使用了wait 和 play，这两句话该怎么翻译？not...until 与延续性动词能否一起使用？