Sylvia regularly took a crowded subway train to work during rush hour, so she found it to be a paradox one hot, steamy Tuesday to easily find a seat in a car that was nearly empty. 请教各位老师，paradox后面需要不需要加逗号儿？我认为是最好不加。
Hugging with these gentle giants-cows typically weigh about 1500 to
2000 pounds has an extremely soothing effect.Hugging with these gentle giants-cows (that) typically weigh about 1500
to 2000 pounds has an extremely soothing effect.为什么可以省略？什么情况下可以省略？
Shawn didn’t compete, because he hates competition. He prefers activities that call for cooperation.Shawn didn’t compete because he hates competition. He just didn’t feel well enough to race. Different meaning of because有了一个逗号，句子意思侧重不一样了，请分析。
...明白，恳请请各位指导。题面：In recent years, a lot of trees have been cut down,
which caused soil ________.A.being washed away. B.washed away C.washing away D.to be washed away答案选D，用不定式的被动语态。为什么不能用现在分词或者过去分词呢？我能够理...
Mottlingwas found to be an independent risk factor for mortality, as the analysis adjusted for vasopressor use, mechanical ventilation requirement,and serum lactate elevation.请问老师as在这里是什么词性，as the analysis 怎么翻译啊？谢谢老师!!
The possibilities multiply when you add the crucial missing ingredients— access to your own medical records and the ability easily to share information. 请问the ability easily to share information.中easily这个副词修饰谁？
At this Snowball sprang to his feet, and shouting down the sheep, who had begun bleating again, broke into a passionate appeal in favour of the windmill.句子来源《动物农庄》第5章看不懂里面的语法结构。