A sentence begins with a capital letter, ends with a full stop, and contains a main verb, subject and predicate. It also contains one or more clauses.
e.g. I like you, and you like me.
We would say that this sentence contains two clauses, rather than two sentences.
A semi-colon (;) is used to connect two clauses. It can be used alone, or with words such as however, morover, therefore.
e.g. She's not silly; she's my sister. I think; therefore, I am.
Also try this useful link. This might help you.
Clause and Sentence
Hope this helps!
Student or Learner