Can someone explain to be what accusative and nominative are and how to apply them to relative pronouns? It’s really confusing me.
Here’s an example of what I haven’t been able to answer:
Ex.) Iulia ___ parva puella est, Aemiliam vocat. (qui, quae, quem, quam)
Ex.) ___ Iuliam pulsat? Marcus Iuliam pulsat. (quis/quem)
does the explanation on p 23 not help to explain the difference ? You need to understand that before thinking about relative pronouns.
Do you understand the difference between the subject of a sentence and the object of a sentence?
If you can’t follow the explanation then perhaps this isn’t the textbook for you.
Wise words from seneca!
I wonder if this detailed explanation of Latin case endings in English might help.
https://classics.osu.edu/Undergraduate-Studies/Latin-Program/Grammar/Cases/latin-case
Most English words don’t have a case ending, but some prepositions do, and you already know how to use them. So start from English
He hit me. but I hit him. Notice how when the “he” is getting hit, it adds the letter “m” just like Latin!
I hit him. But he hit me. Notice how when the “I” is getting hit, it adds the letter “m” just like Latin!
Who hit whom? letter “m” added
They hit them. Letter “m” added
Latin just keeps this pattern up. All the 2nd declension nouns puer, puerum, servus servum and 1st declension puella puellam, and 3rd declension canis canem, and 4th declension manus manum, and 5th declension dies diem.
Relative pronoun “The boy whom I am hitting” (We used to use the letter “m” there too.) Puer quem pulso.
Hopefully this helps 
Jim (Jacobulus)