love in december赏析:half an hour 与a half hour

half an hour 与a half hour half an hour later 英语he played ____vpoin for half an hour it takes me only half an hour 英语高手请进 请问“两个半小时”是“two and a half hour”还是“tow and a half hours”？ every hour on the half hour是什么意思? every hour on the half hour 是什么意思？ every hour on the half hour是什么意思 i've been here for about half an hour.have you been looking for me If it was half past four an hour ago,it is_____now.