Parallel structure is an important element of proper writing. Words, phrases and clauses should all be parallel when linked together in a series or connected with coordinating conjunctions. Combinations and patterns of words should all agree with the subject. However, many native speakers and ESL learners are left wondering what parallel structure is, and how can this technique be used in everyday writing? Taken from http://www.grammar.net/parallel-structure
[Infographic provided by Grammar.net]
[Infographic provided by Grammar.net]