1.I feel the question is better,i am looking for the answer,...都可以有多种用法，所以不一定要跟形容词。I look at you.look+介词+宾语是基本用法。2.很多介词都是习惯和固定用法，没啥窍门只能牢记。请不要用中文去解释含义3.通常从句前后是否定的意义。i have not solved the problem untill he comes.4.overcrowding 是指人口众多拥挤，over-crowding是指监狱过于拥挤。5.two thousand and five,two thousand and two hundred.two thousand and twenty.
独孤道兵
