- Always, only, all >> insert not necessarily or sometimes... Not
- Never, none, not one, not once >> at least one, at least once
- Some, a few, several >> no, none
- Sometimes, on occasion, often >> never
- At least, at most, more than, less than >> change to the mathematically opposite term
- Best, worst, greatest, smallest, highest >> not necessarily
When in doubt of how to negate, use "not necessarily."