Speaking of registers, it is necessary to notice that they have different grammatical requirements.
Speaking of registers, it is necessary to notice that they have different grammatical requirements. What is acceptable in the popular register might be unnaceptable in the standard - but the converse is also true: some standard constructions are unnaceptable in popular register (I like to compare this to dress codes: you don't go to a night party dressed in a bath suit... but then you don't go to the beach in a tuxedo either).