Conjunctions are words that connect two parts of a sentence. They are used to combine words, phrases, clauses, or sentences. Conjunctions allow us to expand our sentences and add more meaning and information.

Types of Conjunctions 

There are three main types of conjunctions in English:

• Coordinating conjunctions:
  
  These join two independent clauses or phrases of equal importance. The main coordinating conjunctions are "and," "but," "or," "nor," "for," "yet," and "so." 
  
  
• • Example: "Kelly went to the store, and she bought some milk."
    
    
• Correlative conjunctions:
  
  These conjunctions work in pairs to connect words and groups. Common correlative conjunctions include "both...and," "either...or," "neither...nor," "not only...but also." 
  
  
• • Example: "He not only finished his work, but also helped his coworkers."
    
    
• Subordinating conjunctions:
  
  These conjunctions connect an independent clause with a subordinate clause. Common subordinating conjunctions are "because," "since," "while," "although," "if," and "unless." 
  
  
• • Example: "I went to bed early because I was very tired."

Positions of Conjunctions 

Conjunctions can appear at the beginning, in the middle, or at the end of a sentence. Their position depends on the type of conjunction and how it is connecting clauses.

• Coordinating conjunctions usually appear between the clauses or phrases they are connecting. 
  
  
• • Example: "Kim loves to read novels, but she doesn't own many books."
    
    
• Subordinating conjunctions typically introduce a dependent clause at the beginning of a sentence. 
  
  
• • Example: "Although it was raining, we went to the park."
    
    
• Correlative conjunctions separate the words or phrases they are linking. 
  
  
• • Example: "Both the store and the restaurant are closed today."
    
    

Uses and Examples Conjunctions have several important uses:

• Combine two independent clauses. 
  
  
• • Example: "Jeff worked overtime this week, and he is going on vacation next week."
    
    
• Link parallel words or phrases. 
  
  
• • Example: "Sal likes hiking, swimming, and biking."
    
    
• Connect a dependent and independent clause. 
  
  
• • Example: "Whenever it snows, schools are closed."
    
    
• Show contrast between ideas. 
  
  
• • Example: "He wanted to go to the movies, yet he had too much work."
    
    
• Give options or alternatives. 
  
  
• • Example: "Will you have tea or coffee?"
    
    
• Indicate cause and effect. 
  
  
• • Example: "I came home because it started raining heavily."

So in summary, conjunctions are very useful for creating compound, complex, and compound-complex sentences. Using a variety of conjunctions allows us to express ideas clearly and concisely.