was的否定词是什么?是didn't吗

was的否定词是什么?是didn't吗 什么词的否定词是needn't nobody能否带否定词?Nobody didn't know the answer为什么错的?难道是nobody不能带否定词?Nobody ___the answer.A.have known B.knew C.didn't know Dare knowing 且的否定词是什么 The food is awful.的反义疑问句 是Isn't 还是 is itawful 是否定词吗? 一般过去时的否定形式?was'were+not和在行为动词前加didn't.这两者是通用的吗?如果通用,那I didn't know you like coffee.换成另一种表达方式是什么?Thanks for your answer! 怎能''是否定词吗 without是否定词吗? 几乎是否定词吗? fail是否定词吗 无时无刻是否定词吗? 没有是否定词吗 wrong是否定词吗? seldom是否定词吗? wrong是否定词吗 否定转移的否定词除not外,其他如never,seldom,few,little,hardly,rarely能用于此结构吗I never thought that he was good at maths,反意疑问句是wasn`t he 还是was he? with 这是单词的否定词是什么?急用! “didn't” 的过去式是什么?