In British English^x, Spelling^x, English grammar^x

From Merriam Webster's : AIN'T Etymology: contraction of are not 1 : am not : are not : is not 2 : have not : has not 3 : do not : does not : did not -- used in some varieties of Black English Usage: Although widely disapproved as nonstandard and more common in the habitual speech of...

The first thing to note is the spelling: the correct spelling is a-c-c-u-s-a-t-i-v-e. Another thing to note is that the term often employed to identify the "case" of words like "him", "her" and "whom" is Objective, rather than Accusative (which is misleading in a simplified grammar like...