Amo, Amas, Amat has stuck. That's about it.
Oh and the verb at the end appears.
amamus , amatis, amant
Did Latin O level at the ripe old age of 13 - my Grammar school was focussed on Oxbridge and at that time it required Latin even for science students. But because Latin is logical I found it far easier than French.
Remember a school skiing trip to Cortina D'Ampezzo in the Italian alps. I fancied my chances with a shop girl in the town but she couldnt manage English or French and I couldnt do Italian. So I tried propositioning her in Latin. After all it couldn't be much different to Italian could it? All I got was hysterical laughter and I still dont know if it was the language of Caesar with a broad yorkshire accent that got her going or that the best I could do was an invite to come along to my encampment. The last Latin book I had studied was Caesar's Gallic wars
Either way it didnt work.