Which is correct grammar If I were a man would punch you or was you?

The grammatically correct sentence is: "If I were a man, I would punch you."

Here's why:

* "If I were a man" is the correct conditional clause. This uses the subjunctive mood, which is used to express hypothetical situations or wishes.

* "I would punch you" is the correct main clause. It indicates the hypothetical action that would be taken.

The other option, "was you," is grammatically incorrect. The correct form is "were you."

Additionally, the phrase "was you" is grammatically incorrect because it uses the wrong tense. It should be "were you," as "you" is the subject of the verb "were."