1、陈述句中肯定句变为否定句,大部分是用not来改变谓语结构,但也有借用否定意义的词,如nothing, nobody, none, neither, little, few, never, hardly等,例如::
A:Tom does well in maths.
B:Tom doesn’t do in maths.
A:He has much to do.
B:He has nothing to do.
A:All of my classmates like art.
B:None of my classmates likes art.