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？
...文投稿，内容包括：1.读报的经历；2.喜爱的栏目；3.期望和祝福。注意：1.写作词数应为80左右；2.请按如下格式在答题卡的相应位置作答。Youth and Me _______________________________________________________________________________________________________...
...ere as near as early man could get to writing. 这句话的意思：they
和早期人类能够写的一样近？这是什么意思呢？3)
It seems that man was making a real effort...很难理解这里的过去进行时？？感觉使用一般过去时比较好理解？另外，书上说“than...
...ve been waiting here for some time.现在完成进行时2怎么区分辨别和使用，现在完成时和现在完成进行时呢？现在完成时,有表示从过去开始，一直持续到现在的动作，可能还会持续下去如They have lived in Beijing for five years.而现在完成进行...
我随便写个句子：
The birth rate stands at 1% this year，the lowest since 2000.
对the lowest的理解应该是（being）the lowest呢还是（which is）the lowest？哪个合适？（我认为两个都合适）
如果在改改主语He said that the birth rate stands at 1% this year...
...中收集垃圾后并装船， sensor detect when the
dumpster are full，at which point a text is automatically send to a local operator says
that…想请教这句话这里为何要使用which，因为我觉得这里which后面并没有引导一个定语从句。所以我想可以写成at that poi...
...present.译文：无论在过去还是在当今， 中国在科学，技术和艺术革新方面都展示出了巨大的创造力。 作比较的句子：There is enormous creativity found in Chinese scientific, technological and artistic innovations past and present. 请问老师，...
We live in an age of rapid technological advance/advancement.advance本身可做名词，表示“发展”的意思，advancement在advance后加后缀，构成名词，也有“发展”的意思，那么，advance和advancement两者在表达上有什么区别？
...y
soul disliked, and some which pleased me well; but never till now with that
sense of security which makes a home. At any moment I might have been driven
forth by evil accident, by disturbing necessity. For all that time did I say within myself: Some day, perchance, I
shall have a home; yet the "pe...
However, the day before Christmas when
he was drinking hot chocolate with a satisfied smile at the door of his home,
he heard the discussion of the children of the family about what they might get
for Christmas.请问老师：1 when he was drinking hot chocolate with
a satisfied smile at the door of...
向尊敬的曹老师请教！例句1：He was using exactly the same pen as I was.看过曹老师对例句1的解答“as引导的从句均表示比较的意义，as并不是指代名词本身，而是修饰名词前的形容词或直接修饰形容词”。2、I don't have such a pen as needed.3...