during用来表示一段时间，其意义大致相当于in的用法。一般来说，凡是能用in的地方，也可以用during.例如：He came to see me during my absence.Don’t go to see his wife in his absence. B）during与in的区别在于during强调时间的延续性，而in则只是一般指某一时间。试比较：They visited many cities during their stay in China.Her grandpa was killed in the war.
