half past hour和half to hour的区别

half past hour和half to hour的区别 half an hour 和a half hour有什么区别? half an hour 与 one half hour区别 one past half hour 中的“hour”要不要加“s”? 是half hour还是half an hour? half an hour or a half hour? a half hour还是half an hour? half hour =half an hour half an hour later half an hour? half a hour Let's------there at half past hour .A;goes B;go C;to go D;go