This is from a Latin course I took in high school. It really is not something that you would probably expect on this site, but is interesting and relates very 
Latin has five cases:
- Nominative – Subject
- Genitive – Possession (‘s or of)
- Dative – Indirect Object
- Accusative – Direct Object
- Ablative – Object of Preposition
Present System
(I love, I am loving, I do love)
-0 -mus amo (I love) amamus (We love)
-s -tis amas (You love) amatis (You plural love)
-t -nt amat (He, She, It loves) amant (They love)
You can see in English it is ‘I love,’ in Latin, you take amar and drop the -ar and add an ‘-o’. It gets kind of complicated with different tenses, but in your native language you probably change tenses without even realizing it and don’t see it as complicated. It takes a while to get used to, but is possible and can become easy. The declension endings correlate to words that end in -a, -ē, -e, and -ī. The macrons are important. When the verb ends in -āre, -ēre, -ere, and -īre they are infinitives and are translated as to plus a verb (e.g. iuvāre means to help). Forgive me if this wrong as this high school Latin course was many years ago.
Nouns
First Declension Second Declension Third Declension
a ae us/er/um ī/a -/- ēs/a Nominative
ae ārum ī orum is um Genitive
ae īs ō īs ī ibus Dative
am ās um/um ō/a em/- ēs/a Accusative
ā īs ō īs e ibus Ablative
Fourth Declension Fifth Declension
us/u ūs/ua ēs ēs
ūs uum ēī ērum
uī ibus ēī ēbus
um/u ūs/ua em ēs
This is coming back to me. When you read a Latin historical document the declension endings help clarify what case the noun is and there is something whether the word ends in -ar, -er, and -ir. First declension is only used with words that end in -ar. There are irregular verbs and probably nouns too. Later this week I plan to update and revise this and add some verb endings for the future, imperfect, and present. I had to find something to post as I am trying to write every week. This may not be the best, but is interesting and I have some plans and ideas for posts that are hopefully better or at least more relevant.