A sentence means a group of words that makes complete sense. It begins with a capital letter and ends with a full stop. It always contains a finite verb. A sentence may be a statement, question, exclamation or command. It consists of a main clause and one or more subordinate clauses. A sentence may be short and simple or long and complex. For example:
She likes Sweets.
She likes Bengali Sweets.
She likes Bengali Sweets which are made of milk.
She likes Bengali Sweets which are made of milk and are tasty.