Copywriting isn’t about grammar.
It’s about making a better guess about your buyer’s psychology.
The marketer on the left is betting the shopper experiencing toothache is thinking:
“I can’t bear this anymore. I need relief now.”
The marketer on the right is betting that the shopper is thinking:
“On a pain scale of 1 to 10, I’m at a 10.”
Today, the marketer on the right won.