The best replacement for passive voice is active voice.

The best alternatives to passive voice are rated as following:
★★★★★  active voice
★★  past tense
★  active
★  active voice in writing
★  direct voice

Your alternative for passive voice is not listed? Suggest!
Speaking about passive voice, one probably shouldn't forget about agent.

Other search terms related to passive voice and their ratings are:
★★★★★ agent
★★★★ modals
★★ modal auxiliaries
★ auxiliary verb
present perfect tense
modal
You have in mind a companion for passive voice and it is not yet here? Propose!



Google Trends

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passive voice
active voice
past tense