Is it 'what if it costs' or 'what if it cost' and why?

Answer:
What if it costs. It is singular so you use the singular verb form costs
The plural form would be "What if they cost"

"What if it costs" is present tense. "What if it cost" is past tense. For singular Plural it'd be more like "What if the cost" = Singular. "What if the costs" = Plural. -J
First answer by Terpstra. Last edit by Jlskeptic. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 4 [recommend question].