it

/it/

Cases

SingularPluralWhen to use it
nominativeitthe dogitlethe dogsthe plain dictionary form — the doer of the sentence
genitiveitnithe dog'sitlenithe dogs'the owner — whose it is
accusativeitnithe dog (as the object)itlenithe dogs (as the object)a specific, known object — whom or what
dativeitgeto the dogitlegeto the dogsdirection or recipient — to where, to whom
locativeitdeat / in the dogitledeat / in the dogswhere it is; also having — mende bar, "I have it"
ablativeitdenfrom the dogitledenfrom the dogswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myitimmy dogitlerimmy dogs
youritingyour dogitleringyour dogs
his / heritihis / her dogitlerihis / her dogs
ouritibizour dogitleribizour dogs
you all'sitigizyou all's dogitlerigizyou all's dogs
theiritleritheir dogitleritheir dogs

The overlap in the last rows is real, not a mistake: itleri can mean "his / her dogs", "their dog", or "their dogs" — context decides.