1. With a parallel structure:
* Not only did she finish the marathon, but she also set a personal best time.
* Not only is the food delicious, but the service is also excellent.
2. With a verb phrase:
* Not only have they been working hard, but they've also been having a lot of fun.
* Not only did he forget my birthday, but he also didn't even apologize.
3. With a noun phrase:
* Not only the students, but also the teachers were excited for the field trip.
* Not only the main character, but also the supporting roles were well-acted.
4. With an adjective or adverb:
* Not only was the movie funny, but it was also surprisingly insightful.
* Not only did they perform well, but they also looked incredibly confident.
Remember: "Not only" should always be followed by "but also" or "but" to complete the phrase and create a parallel structure.