Alex Shepard has been a language researcher for the better part of his life. He has postgraduate degrees in English literature and linguistics, and he has worked for over a decade ...view moreAlex Shepard has been a language researcher for the better part of his life. He has postgraduate degrees in English literature and linguistics, and he has worked for over a decade with English second-language learners from around the world.For more help with your grammar, visit Rockwallerbooks.com!view less