Warning: Advanced Grammar is not responsible for the consequences of using active voice. Side effects may include, but are not limited to: increased productivity, decreased productivity, spontaneous combustion, or the sudden urge to use the passive voice.
Modal Muddle is a related topic that may help you understand the nuances of voice choice.
For further reading, see our Modal Muddle Mishmash subpage.
Semicolon Drama is a closely related topic that will make you question everything you thought you knew about grammar rules.