一般现在时结构,肯定句改成否定句,肯定句改成一般疑问句怎么改

不知道还能不能赶上啊.
一般现在时的动词有两类：
I.be动词
肯定句：主语+be+其它：He is a worker.
否定句：主语+ be + not +其它.如：He is not a worker.
一般疑问句：Be +主语+其它?如：-Is he a worker?-Yes,he is./ No,he isn't.
II.行为动词
肯定句：主语+行为动词+其它：She likes bread.(主语是第三人单数,行为动词必须用单数)
否定句：主语+ don't( doesn't ) +动词原形+其它.如：She doesn't like bread.
一般疑问句：Do( Does ) +主语+动词原形+其它.如：
- Do she like bread?
- Yes,she does./ No,she doesn't.
估计晚了哈,也不错哦!
不懂追问吧》》