I'm a native English speaker and nobody told me this (and I didn't manage to pick it up) until I was nearly 40. "Cost"'s past tense is also "cost."
There's another, newer, largely fatuous, verbed "cost" that means "to calculate the cost of something." That's the one that gets used in the past tense ("the projects have all been costed.")
"I've costed a keyboard replacement for my computer, and the total is more than the computer cost in the first place."
"Cost"
I'm a native English speaker and nobody told me this (and I didn't manage to pick it up) until I was nearly 40. "Cost"'s past tense is also "cost."
There's another, newer, largely fatuous, verbed "cost" that means "to calculate the cost of something." That's the one that gets used in the past tense ("the projects have all been costed.")
"I've costed a keyboard replacement for my computer, and the total is more than the computer cost in the first place."