以下三个短语都可以:1)not...but...如:Not you but I am right.2) ...instead of...如:I went out instead of staying at home last night.3) ...rather than...如:I am a teacher rather than a student.
但和而是英文不一样。not but表示“不是而是”,常见的搭配有:It's not...but/however.../While...but/...despite of that...。例如:It is not quantity but quality that counts.重要的不是数量而是质量。