Multiple choice

Past participle of “cost”

  1. cost

  2. costed

  3. both 1 and 2 are correct

  4. none of the above

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A Correct answer
Explanation

Cost is an irregular verb that keeps the same form for past participle. The past participle of cost is 'cost', not 'costed'. In the meaning of estimating price, 'costed' can be used, but for the standard meaning of the verb, 'cost' is correct.