He said to his friend that his alma mater was very beautiful and had many lakes.我的疑问是：如果母校现在仍然在，情况和以前一样，从句中was/had是否应该改为is/has，尽管主句时态said是过去式？即：如果主句时态是过去式，但是从句的情况如果...
...比较级修饰名词：Hydrogen, which is ______ than oil, is pretty easy to produce... 答案是d.a much more abundant energy source, 但我的问题是选项b中 an energy source more abundant 为什么不对，形容词比较级做后置定语修饰名词不是相当于省略的定语从句...
He told her of feeling, which, in proving of what importance she was to
him, made his affection every moment more valuable.
各位老师好，请问in proving of并不是固定搭配，只是in接动名词proving构成的一个介词短语做插入语而已，是吗？
every moment是名词短语...
Non-identical twins, who only share about 50 percent of their genes, differ in how strongly they attract mosquitoes, the scientists found.老师，这句话的结构没看懂，differ in how strongly they attract mosquitoes，这句话在里面是什么成分？ 正常语序是：the scientists...
Covering much of the earth's surface is a blanket of water.上句中, is 是系动词吗？这是倒装句吗？上句可以倒过来说，即 A blanket of water is covering much of the earth's surface 吗？修改后的句中is covering还是系动词吗？
The automobiles move only when they contain at least one occupant, whereas railway carriages spend a considerable amount of time running up and down the tracks vacant,or nearly so.这里的vacant只有形容词的词性，是做状语，还是定语修饰前面的主语carriages？无论是做状语...
2021年黄石中考有这样一道题：Over the past few months, Chinese COVID vaccine(疫苗) _________ in many other countries.A. have arrived B. arrived C. had arrived这个句子的时间状语over the past few months是一段时间，按理说谓语动词应该是延续性动词，...
"How tall we are now is strongly influenced by the environment we grew up in," he said.这个句子为什么不是 the environment in which we grew up ?请问老师们，这个句子环境后面的限制性定语从句为什么不用in which?
Some conferences spare a slot of time for Research-in-Progress Sessions.Research-in-Progress papers may be submitted as short papers(3-4 pages) or abstracts(1 page),describing an ongoing research project or study.加粗字体的括号如果要去掉，括号里的内容要怎么修改才能使...