Based on function or based on purpose sentences are of the following types:-

1. Simple Sentences or Any Statement, Descriptive Sentences, Assertive Sentences,
2. Negative Sentences
3. Interrogative Sentences
4. Negative Interrogative Sentences
5. Imperative Sentences
6. Exclamatory Sentences

https://lighthouseedulight.com/different-kinds-of-sentences-english.html