概述:一般现在时(The Present Indefinite)表示现在成为习惯或经常性的动作;现在进行时(The Present Continuous)则表示现在正在进行的动作。1.1 现在进行时的构成肯定句:主语 + am/is/are + 现在分词.否定句:主语 + am/is/are + not + 现在分词.疑问句:Am/Is/Are + 主语 + 现在分词.?疑问代词/疑问副词 + am/is/are + 主语 + 现在分词.?1.2 现在进行时的肯定句句型:主语 + am/is/are + 现在分词.构成方式:They are cleaning the house.他们在打扫屋子。He is brushing his teeth.他正在刷牙。Mother is waiting for me.母亲在等我。1.3 现在进行时的否定句句型:主语 + am/is/are + not + 现在分词.现在进行时的否定句是在助动词am/is/are后加not:Im not doing anything right now.