If this were the case, you'd see an English somewhat like this:
Ich, þou, he/schie/it, we, ye, þey;
ich make
þou makst
he makþ
we makeþ
subjunctive: ic/we make
past: makte, maktest, makten
participles: makend, gemakt
ich am
þou art
he is
we sind
Finden:
ich finde, þou findest, he findeþ; ich fand, ich habe ifunden
if we sind soþleich free Menn, þenn we cunneþ seen, hu lange ure diersten Freedomes beleifeþ.
Something like that, I'd think. There'd be two numbers, three cases (nom, gen, object), and maybe three genders. The weakening of the final -m in the dative would have merged the dative/accusative cases for masculine/neuter nouns, and the similarities in case endings for feminine would have reduced those to a simple -e in the singular, and -en in the plural.
Masculine:
Staan, Staans, Staan; Staanes, Staanes, Stanen (dat. pl)
Feminine:
Teid, Teid, Teid; Teide, Teiden, Teide
Neuter
Lamb, Lambes, Lamb; Lamber, Lamber, Lambern
The:
M: þe, þes, þen, þen
F: þe, þer, þer, þe
N: þat, þes, þen, þat;
PL: þe, þer, þen, þe
What do you think?
James