HEe will come back after half an hour哪错暸喒改正
问题描述：
HEe will come back after half an hour哪错暸喒改正
答
我觉得应该是after后加一个时间点吧,比如说after two o'clock,要加half an hour这样的一段时间,应该用in吧,He will come back in half an hour