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Hi what's the difference between
"what firmware is your psp" and "what is your psp firmware."

"what tense is this" and "what is this tense"

I wonder why sometime the noun can be right after the wh-question but sometime after the "to be"

Thanks
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No difference that I can see.
Are both form okay?

are they grammatically correct?
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Yes and yes.
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Both What tense is this? and What is this tense? have the underlying structure What tense is this tense? so they are more or less equivalent, being different "abbreviations" of the same sentence.

CJ
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I just wanted to clear my doubt, because yesterday i posted a question "which is correct, what game is this or what is this game." and one said it's "what is this game"

Thanks