Is there any difference in meaning between past forms of the verb cost: cost and costed??
Hi everyone,

Please help me solve the riddle:
I've just found two different forms of past tense and past participle of the verb :"cost"
a definition given in dictionary tells that there is "cost, cost, cost" and "cost or cost-out, costed costed"

Is there any difference in meaning between this two "cost? (I mean "cost and "cost" or "cost out")

Question

Is there any difference in meaning between past forms of the verb cost:  cost and costed??
Hi everyone,

Please help me solve the riddle:
I've just found two different forms of past tense and past participle of the verb :"cost" 
a definition given in dictionary tells that there is "cost, cost, cost" and "cost or cost-out, costed costed"

Is there any difference in meaning between this two "cost? (I mean "cost and "cost" or "cost out")

Answer

For the common use of cost, the forms are cost, cost, cost. 
E.g. "The bread costs one dollar," = One dollar must be paid in exchange for the bread.
However, quite recently, we have started using "cost" in the sense of "to assign a price to" or "to assess the likely costs of" or "to calculate a budget". In this usage, the forms are cost, costed, costed.
In the second usage, "I costed the project at ten thousand dollars," this means that the calculation of the project's likely costs amount to $10,000.