だ ⇒ やTo be, Am, Are, Is

One of the most basic changes that takes place in 関西弁(かんさいべん) is that of the auxiliary verb だ. だ is replaced directly byや, with や keeping exactly the same meaning (asserting that something is true).

As や is a replacement for だ, it will follow all of the same conjugation rules. This means that it will mostly be seen after な-Adjectives, or nouns. It should not be attached to verbs or い-Adjectives, unless as part of a set expression.

や will regularly be seen in many of the same conjugation patterns as だ, meaning that it conjugates in the same way. A few examples of this are やろ（だろ）, やったら（だったら）, and やけど（だけど）.

Caution

As with standard Japanese, particles are regularly dropped in 関西弁(かんさいべん). This means that many sentences may appear almost exactly the same as they would in standard Japanese, purely due to omission of the particles that would be different.