现在进行时 1、 现在进行时的构成:be动词+ V-ing 1. 表示动作正在进行They are playing basketball now. 现在他们正在打篮球。 2. 以look, listen开头的句子(提示我们动作正在进行)Listen!She is singing an English song. 听!她正在唱英语歌。 2、 现在进行时的变化 肯定句式:主语 + be( am, is, are)+ V-ing +其它+(.) I am doing my homework. He is washing his clothes. You are flying a kite. 否定句式:主语 + be(am, is, are) +not + V-ing +其它+(.) I am not doing my homework. He is not washing his clothes. You are not flying a kite. 一般疑问句:Be(am, is, are)