What are the different sentence types

There is 4 sentence types: Declarative, Imperative, interrogative, exclamatory.
-The declarative type, as it name says, it declares something, state a fact, claim something, there's no feelings in it  or a question, nothing: You're just stating something.
Example: I'm eating an Apple.
-The Imperative type states an order, or is used to give advices.
Example: Do Your homework.
-The interrogative type is used to ask questions.
Example: Do you like apples? Did you do your homework?
-The exclamatory type is used to express emotions like anger or happiness or surprise etc...
Example: This apple is so delicious! That's such an amazing view!

Hope this Helps! :)

You have simple, compound and complex and compound- complex.
Simple sentences are like so: I like to eat. 
(pretty simple right?)
Compound sentences are like so: I like to eat, but my friend hates eating.
(Putting commas now)
Complex sentence are like so: Because I like eating a lot, I decided to become a chef.
(Adding reasoning.)
Compound-Complex sentence: Because I like eating, some people think I will get big, however I started taking exercising classes to prevent that from happening. 

Hope this helps. :)