印象中,像come, go, leave, arrive 表示位移的终止性动词的进行时结构表示将来。 可是,在中学的教材中,有这样的例句:What are they doing for vacation? They are relaxing at home. / How long is he staying? He's staying for a week. 等等。为什么延续性动词也可以表示将来呢? 请问:怎么判断be doing是进行时还是将来时啊?
进行时表示将来时是表示按计划要发生的事。如 what are you doing for the coming vacation? we are visiting Beijing. how long are you staying there. we are staying there for a week.