1、2、现在进行时表说话时或目前一段时间内正在进行的活动:或表感情色彩,加强语气。与频率副词,如always,constantly,continually,again等连用表示说话人的某种感情色彩(赞叹、厌烦、埋怨等)。We are having English class.The house is being built these days.The little boy is always making trouble. 考点一:在时间状语或条件状语从句中表示将来正在进行的动作。Look out wh
2、en you are crossing the street. Don't wake him up if he is still sleeping at 7 tomorrow morning.考点二: 表示在最近按计划或安排要进行的动作(这时多有表示将来的时间状语)。Marry is leaving on Friday.