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问题 envelope 可以用作动词吗

看到这样一个句子：She was enveloped in a huge white towel. 这里的 enveloped 是动词吧？指像信封一样被白色大毛巾包着？

问题 句子成分

At issue is the TMT's planned location on Mauna Kea, a dormant volcano worshiped by some Hawaiians as the piko, that connects the Hawaiian Islands to the heavens. 后面的定语从句是修饰M K吗？

问题 破折号

Which means American officials could decide—say, in a conflict with China—to switch off or degrade the signals coming from GPS satellites.两个破折号内的内容是插入语吗？为啥，say用原型啊，翻译成“如果说”？

问题 at work做什么成分

There has been a kind of inflationary process at work.at work做什么成分？如何理解？

问题 hence用法

By the third generation, the original language is lost in the majority of immigrant families. Hence the description of American as a “graveyard” for language.请问老师，hence的用法是什么？为什么可以引导一个没有谓语的简单句？

问题 改错的问题

Government cannot inject a single dollar into the economy if it has first taken that same dollar out of economy.改错。请问老师，下面这个解析是不是有错误，1.inject...应该发生在take...之后？2.是否可以把if改成unless?

问题 现在分词的迷思～

It felt like a knife being thrust through her heart.目前的我只模糊知道thrust through her heart是表语～但是不知道being thrust through her heart算哪种句子成分，请大神指点～

问题 from用法

这里为什么用from，文章是想表达委托有才华的现代建筑师，from是“从……”，成了来自才华的现代建筑师的委托？比如：He received a commission from the king to paint the queen's portrait.他受国王之命为王后画像。

问题 插入语的谓语动词

She offered to help, say that, “Why not make a necklace for her?”为什么插入语的 say 要改成 saying?

问题 not 提前

But not even a great health-care system can cure death-and our failure to confront that reality now threatens this greatness of ours.请问老师，这个not提前是倒装吗？为什么not要提前啊？

问题 句子结构解析

I had written my first English essay ever just a year earlier, when applying to colleges, and now came the papers analyzing the canons. 请问老师该句中 came the papers analyzing the canons 结构该怎么理解？

问题 如何分析修饰语的修饰对象？(10)

[原句]：Arriving at the Blue House, he wasted no time launching his peace offensive toward North Korea, flying to Pyongyang last June for a landmark summit.[译文]：他一入主青瓦台，立刻就在第一时间展开对朝鲜的和平攻势，在去年六月飞到平壤参加划时代的朝...

问题 back是介词吗

个人认为 back 不属于介词，是副词句中go back 不及物，为何能能接宾语？请问老师下列例句为什么有宾语：Some of their ties go back a long way.

问题 when doing..用法疑问

The document calls America a partner when battling such global menaces as climate changes.老师好，请问这里的when battling...是什么成分？

问题 simple还是simply

It's not_____(simple) a question of money.  老师这里为什么填simply，is后面不是用形容词吗？不是直接填simple吗？谢谢！