主语+系动词+not+名词短语,but+名词短语。
eg:She is not a teacher,but a student.
她不是一名老师,而是一位学生。
只要前后成分相同就可以了
he does not love Mary, but Helen
he does not want to go shopping, but playing video games
what he want is not go shopping, but play video games
he does not like the fact that he is tall, but that he is smart
句子跟名词短语都行的
名词短语
but为介词,后跟名词。