when I boarded the train, I could not help noticing that a great many local people get on as well.请问老师这里的when是副词引导从句还是两个并列句呢，如何区分when在这两种用法呢如果是从句的话，能否省略为 （When） boarding the train , I ...，这里的whe...
There must be few questions on which responsible
opinion is so utterly divided a s on that of how much sleep we ought to have. 老师，请帮我分析一下语法结构，后面那个定语从句没看明白，as是干嘛用的，that指的是什么。帮我划分详细一点，谢谢
He is really grieving over the loss of something beautiful more than useful.请问老师，这里是所谓的more a than b结构吗？改写为he is really grieving over more the loss of something beautiful than useful.与其说他因为有用事物的消逝而悲痛，到不如说他是因为美丽...
“The children who played with puzzles performed better than those who
did not, on tasks that assessed their ability to rotate and translate shapes.' 'Levine
said in a statement.来自2020高考卷二B
Also remember that for a gem ring or pendant, roughly 70% of the value of the piece of jewelry is in the primary stone(s), with the rest in labor and metal.此处with是表“伴随”的用法吗，可译为“而”，“同时”？
这里的背景是介绍旅游时可以去什么地方，然后一一列举这些地方：time share apartment: accommodation which one owns, say, a 26th part of
and so has the right to stay there
for 2 weeks every year.这里and so是什么用法，后面has为什么没有主语？
He came from a rocky farm in Italy, somewhere south of Rome. 请问老师， Somewhere 在此句已经不是副词的词性了，somewhere 是不是用作名词词性，作动词came from的宾格呢？此外“somewhere south of Rome”是什么成分？是Italy的同位语吗？谢谢老师。