Answer by Magmatic for In the sentence "She says she has no friends," the number of friends is zero, why is "friends" still plural?

The rule two or more is not as correct as the rule not one. The rule should be "Add an 's' if the number of items is not (positive) one."

The following sentences are correct:

• "I have one car."
• "My friend has two cars."
• "After losing fifty percent of my car to rust, I now own 0.5 cars."
• "After losing fifty percent of my car to rust, I now own half a car."
• "I had one car. Then I gave away two cars. That leaves me with -1 cars."