she covered a distance of eight miles,she covered a distance for two hours,如何区分of ,for

covered的意思during that time,she covered a distance of eight miles.啥意思? she covered a distance of eight miles,she covered a distance for two hours,如何区分of ,for focal distan During that time she covered a distance of eight miles.这句话中为什么加a. 英语翻译能否这样翻译:she covered a coat for the child. During that time she covered a distance of eight miles .这里of是什么用法? she covered a clipboard with the paint什么意思?上文是glow-in-the-dark paint covered covered She covered the well with a big stone 的被动语态及The workers are buiding a new road. covered a distance的意思 A be covered with B She covered the child with a coat.这句话里的With怎么用的?这是个什么句型? She was covered in mud.in为什么不能换成with? the boy covered himself with a b___ A smiling face covered many tears the young man ____10,000 miles so far. A has covered B had covered C covered.选哪个,为什么?谢谢 In 1620,about half the USA__forest.A.was covered B.was covered by C.were filled with D.covered with