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Logical connectors are used to join or connect two ideas that have a particular relationship. These relationships can be:  

  • sequential (time)
  • adversative (opposition and/or unexpected result)
  • condition
  • reason and purpose

Types of Logical Connectors

Conjunctions (Coordinating Conjunctions)
Used to combine two complete sentences, forming a compound sentence
Example:  and, yet, but, or, not, so, for
  • He didn't do his homework, so he didn't pass the class. 
  • Shirly and Vikie are having their dinner at the restaurant.  

Adverbial Expressions (Subordinators / Subordinating Conjuctions)
Used to introduce an adverbial clause, forming a complex sentence
Example: although, though, even though, while,because, since
  • He went to bed because he was tired.
  • He missed the meeting in spite of the fact that he left the house early.

Adverbial Conjunction
Used to show a logical connection between two sentences.
Example: also, in addition, moreover, furthermore, therefore, thus, accordingly, as a result
  •  He was tired. Therefore, he went to bed. 

Prepositions
Used to introduce a prepositional phrase: always followed by a noun phrase
Example: as well as, until, during, before, after, since
  • He went to bed because of being tired.
  • In spite of leaving the house early, he missed the meeting.

Adverbs
Used to provide more information about a verb.
Example: also, still, actually
  • There was an accident on the freeway. He consequently missed the meeting.
  • He left the house early. He still missed the meeting. 

As a summary


   
  (taken from http://prezi.com/m0saycrlj3fr/logical-connector-or-linking-words/)