In Nominative^x, Word order^x, Direct objects^x

We certainly don't want you to flunk! First, you have to know what a noun is and what a pronoun is. A noun is a person, place or thing, like a house, a dog, a pen, a computer, or the Internet. A pronoun is a word that substitutes for a noun. "I" substitutes for AlpheccaStars....

Although I'm a native English speaker, I've often struggled to understand English grammar, especially its morphosyntatical elements. I've done some reading on nominative-accusative as well as ergative-absolutive cases and I just don't get it. Can someone who's better at linguistics explain...