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 oclock 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.2. 一般现在时表示经常反复发生的事情或动作，常与often, usually, sometimes, always, every day(week year) 等词连用。结构是主语+动词原形；当主语为第三人称单数即he,she, it, Tom, my mother, the boy等词时，动词后加s或es.如：We have an
