1. The study, coupled with statistics, make him wonder which method is right.2. The committee evaluated a novel based on the author's life.请问老师，如何判断过去分词是作后置定语还是状语呢？
More than 20 people have vaccinated, which is one of the reasons the outbreak has not spread further than it has.it 是指的什么？ has指的是什么？than it has 是省略后的比较状从，还原回去是什么呢
Big chains have been collecting sales tax nationwide because they typically have physical stores inwhatever state a purchase is being shipped to.in至句尾在原因状语从句中作地点状语，in后面是whatever引导的宾语从句是吗？如果是，whatever在从句中作什么成分呢?
Discipline is doing what you know needs to be done, even though you don't want to.1.这里what是在宾语从句里面作定语成分吗？you know what needs2. you don't want to 为什么介词to后面什么词也不接？这是语法错误吗？
...人们在困难的情况下保持清醒和自信。(2020北京卷阅七)
She was so confident
about her skills. 她对自己的技能非常自信。(2018天津卷单选)
□confidently adv.自信地，肯定地。如：
The little girl
walked confidently onto the stage, ready for her first speec...
Railroads typically charge such"captive"shippers 20 to 30 percent more than they do when another railroad is comepting for the business.这句话比较级结构看不懂，求分析一下句子结构和意思