我理解这三句都是部分否定。具体你应该查一下语法书。你这个三个句子都是否定词和everyone连用,是部分否定。如果全部否定,去掉否定词,改用none或nobody, no one。
1) Not everyone like talent shows. 2) Everyone doesn't like talent shows . 3) I don't agree with everyone.
【答】一、(Not )everyone 作主语时,谓语动词应该用单数,所以, 1) Not everyone like talent shows. 应该改为: 1) Not everyone likes talent shows. 二、不管not 位于不定代词everyone 之前 或者后面,都表示部分否定。例如:Not everyone is kind. = Everyone is not kind. 并非所有的人都很友善。I don't know everyone in this town. 我并不认识者镇里所有的人。(摘自《英汉多功能词典》新编升级版)