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Discover LudwigThe phrase 'have required' is correct and usable in written English.
You can use it when you want to indicate that something needed to happen in the past. Example sentence: The changes we have made over the last few months have required us to adjust our procedures.
Exact(60)
We have required elements.
"Some have required multiple surgeries".
That would have required Congressional action".
The studies have required time and personnel.
This must have required enormous restraint.
That would have required a tax increase.
To see everything would have required cloning.
AV would not have required extra machines.
Passage would have required 267 votes.
Still, basketball and school have required adjustments.
The changes have required some complicated planning.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com