现在进行时态肯定句与否定句的句式结构

显示全部楼层 · 2010-5-5 20:42:50

肯定句: 主语 + be动词 + 动词ing
比如：He is doing his homework now .否定句：主语 + be动词+ not + 动词ing
（句式和肯定句相同，不同的是否定句要在be动词后面加not）比如：He isn't doing his homework now .

千问 · 2010-5-5 20:42:50

肯定：主语（I/You/He/She/It/We/You/They)+be动词（am/is/are)+动词ing例句：I am watching TV.She is eating lunch.It is raining outside.否定：主语（I/You/He/She/It/We/You/They)+be动词（am/is/are)+not+动词ing例句：I am not reading a book.We are not listening to the music.They are not doing their job.