辨析时间介词on,in和at 还有how often,how long和how soon every day和everyday 一共三组
问题描述：
辨析时间介词on,in和at 还有how often,how long和how soon every day和everyday 一共三组
答
1.on和in“on”用于“具体的某一天“或者”“一个特定的时间”,或者是特定的早晨,中午下午,如on 1st October,on a rainy day,on the morning of his arrival“in”用于“较长的时间”,如in the 1980s,in the morning...