一道英语的句型转换题
问题描述：
一道英语的句型转换题
His pants are black.(否定句)
His pants （ ）black.
说说为什么要这么写,解释说明下.用doesn't
答
are not
不能用doesn't ,句子中应该有谓语,用doesn't 则没有动词,doesn't是助动词,不能做句子的谓语,已给句子中谓语为are,则否定应该否定谓语,因此为are not