The author most likely uses the word unusual to
Incorrect.
[[snippet]]The passage states that AAVE uses the only the word been to show recently completed actions, while standard English has several versions of the verb to be.
Incorrect.
[[snippet]]This usage of the word been is an exception to AAVE's regular rules about using the verb to be. However, the author is interested in reporting this exception rather than passing judgment about it, which is unlike a GMAT Reading Passage author.
Incorrect.
[[snippet]]This sentence specifically states that this usage of the verb to be is unusual within AAVE. The usage of the word been within standard English is beyond the scope of this passage.
Incorrect.
[[snippet]]The word unusual implies that there is a usual usage of the verb to be within AAVE. This implies that AAVE does have grammatical rules that govern the usage of the verb to be.
Great!
[[snippet]]In the second sentence, we find that usually, speakers of African American Vernacular English omit the verb to be in everyday speech; the author uses unusual to remind us of that.
show that, unlike standard English speakers, African American Vernacular English speakers use several versions of the verb to be to indicate a recently completed action
hint that African American Vernacular English's usage of the verb to be is improper
emphasize that using the verb to be is not common in African American Vernacular English
indicate that the word been is not used properly according to the standard English rule
contend that African American Vernacular English does not have any grammatical rules regarding the use of the verb to be