1现在进行时 表示正在发生的事情或进行的动作,常与now,listen,look等词连用,结构是主语+be动词(am, is, are)+动词ing. 如:It is raining now.外面正在下雨 It is six o’clock now.现在6点了 My parents are reading newspapers in the sitting room.我父母正在客厅看报纸 Look! The children are having a running race now. 看!孩子们正在赛跑 问句将be动词移前,否定句在be动词后+not.