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问题 这个句子中的had 是做插入语用还是谓语？

……a dear old lady who had always been so kind to everybody, had，in her youth,poisoned every one of her five husbands.这个句子中的had用法不太明白，如何理解？谢谢

问题 than后面的is为什么不省略

What genetic modification seeks to do is modifying corps in a more planned way than is possible by merely selecting healthier seeds or by producing hybrids of successful plants.这里than后面的is为什么不省略?

问题 句子翻译

...tural ecosystems more stable.2.We must make all natural ecosystems be able to provide services better.3.We must make all natural ecosystems safeguard national ecological security.这样划分的理解对吗？可2句中为什么没有be动词以及3句中如何体现“牢”？只说了保护而己...

问题 形容词后面的that-从句叫什么类型的状语从句

Italians are increasingly fearful that their favorite food might be adding to their waistlines too. that 引导状语从句，那种类型的状语从句？

问题 survive complete 系表结构吗

The book survives complete only in the second edition of 1533. 这本书只有1533年的第二版完整地保留了下来。 请问句中的 survive complete 是系表结构吗？谢谢！

问题 表示“通过……”用through,by,on中的哪个介词

通过电话，除 on the phone 外，能否用 through the phone, by phone?通过信件，应该是 by letter 还是 by letters?辛苦专家解惑，谢谢。

问题 be different in 后面加名词单数还是复数

be different in 后面加名词单数还是复数？The two sweaters are different in color? The two sweaters are different in colors? 上面两句哪句对？为什么？

问题 英语句子结构分析(寻找主谓结构)

At the heart of the unease about these earliest works of literature were two fundamental questions: first, how could Greek literature have been born ex nihilo* with two masterpieces?were对应的主语是什么？如果对应的是 heart，那为什么是 were 而不是 was?如果对应的是前面...

问题 example is of 是何用法

One example is of children at the age of 6 or 7 painting flowers, fish. 请问老师，这个句子的句型结构？one example is of是何用法？painting flowers,fish是现在分词作children at the age of 6 or7后置定语吗？谢谢老师们。

问题 关于不定冠词和定冠词的用法。

1.An owl can see in the dark.2.The whale is in danger of becoming extinct.语法书上说，第1句的猫头鹰和第2句的鲸鱼都表示某类动物，为什么1句用不定冠词，第2句用定冠词了？

问题 three years after是6年之后吗

In 1929,three years after his flight over the North Pole,the American explorer,R.E.BYrd, successfully........老师，three years after与next three years是有什么区别的,after是副词吗？

问题 可数名词前不加冠词可以吗

No such thing as a ghost exists in the world.No such thing as ghost exists in the world.请问老师哪一种表达对呢，ghost是可数名词，前面需要加不定冠词吧，可是答案给的是不加冠词，指的是鬼魂整体的概念，是这样理解嘛？

问题 since引导的时间状语理解问题？

章振邦高级英语语法497页：Since he joined the army, he was made great progress (自从他参军以后，他有了很大的进步).薄冰英语惯用法词典945页指出since he joined the army - 他在或不在部队里都有可能。那么上句是否意味着，说话的此时此刻，h...

问题 deliver 有双宾结构吗？

Joe Biden addressed the country in his first speeech as president-elect. “The people of this nation have spoken. They've delivered us a clear victory, a convincing victory”请教老师：这里的delivered us a clear victory是双宾结构。 但是牛津词典只显示单宾。所以，老师...

问题 of 后只接wh-引导的句子吗

of 后是只接wh-引导的句子吗?The Chinese people won the great victory of justice over evil, light over darkness and progress over reaction.那这个句子里，of后面的是词组还是句子，若是句子又怎么看？望老师解答，谢谢！