在含有since的时间状语从句中的主要分句能用一般过去时和用完成时有什么含义的不同？The annual assembly was held
outside the Chinese mainland for the first time since its establishment in 2018.与主句改成现在完成时有什么具体语义上的不同？
原句：In terms of attitudes to creativity there seems to be a reversal of priorities: young Westerners making their boldest departures first and then gradually mastering the tradition; and young Chinese being almost inseparable from the tradition, but, over time, possibly evolving to a point equa...
...式的选择：分词的动作在谓语动作之前发生用完成式：Having sung a song, he sat down. = After singing a song, he sat down.他唱完一支歌后，就坐了下来分词的动作和谓语动作同时发生用一般式：Singing a song, he sat down. 唱着歌的同时，他就坐了...
曹老师，之前学习了more...than比较分句，对于more than连在一起的结构，这些句子又该如何理解呢？辛苦老师教导指正，不胜感激。1.He is more than a teacher.这里的more是代词？译为“不仅仅”，是缺省了什么东西吗？2.In the course of a da...
Listen! A teacher and a writer are in the room talking.
问题1：这个句子是现在进行时吗？如果不是 talking 是什么？
问题2：如果是的话，Listen! A teacher and a writer are talking in the room 这样是不是也行？
问题3：既然没有如2那样写，是不是...
a violent eruption can blow the top few kilometers off a mountain,scatter ash practically all over the globe and hurl rock fragments into stratosphere to darken the skies a continent away. 这个句子里的top 和away怎么理解呢,做什么成分
a violent eruption can blow the top few kilometers off a mountain,scatter ash practically all over the globe and hurl rock fragments into stratosphere to darken the skies a continent away. 这个句子里的top 和away怎么理解呢,做什么成分
No one expects Donald Trump to depart Davos a card-carrying globalist.这句话没太懂。expect sb. to do sth.，后面 a globalist 是什么成分呢？个人感觉应该 depart Davos as a globalist 才通顺。希望老师解答!
He realized that a day that he thought could not possibly get even more
horrific just had.1.请问一下，a day 做什么成分？that he thought 是 a day 的定语吗？2. 最后的had 是什么意思做什么成分？
...请帮确认哪些正确,哪些错误:第一组:1):George did more work than anyone else(More为限定词,这个结构应该正确?)2):George did work more than anyone else(这个结构是否正确？我个人认为是错误的)3):George did work more than that of anyone else=George did work more th...
Four passengers aboard a cruise ship that arrived at a port in the U.S. state of New Jersey have been taken to a hospital for coronavirus testing. New Jersey Gov. Phil Murphy said in a statement that officials with the Centers for Disease Control and Prevention (CDC) screened 27 passengers from the ...