Resources for sentence structure
Sentences should be written in the active voice. They should be clear. There should be a mix of concise and complex sentences.
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Dazzle (astonish?) your reader with the right strong action verbs
Read out loud, write how you talk
Novelist M.J. Hyland’s 7 techniques for improved writing
Grammar Girl: How to write clear sentences
Center For Writing Studies: Active Voice
Grammar Girl: Active vs. Passive Voice
Center for Writing Studies: Dangling Modifiers
Center for Writing Studies: Fused sentences, run-ons and comma splices