NominativeAccusativeDativeGenitive
ichmichmirmeiner
dudichdirdeiner
er/sie/esihn/sie/esihm/ihr/ihmseiner/ihrer/seiner
wirunsunsunser
ihreucheucheuer
SieSieIhnenIhrer
siesieihnenihrer
NominativeAccusativeDativeGenitive
Imeto/for meof me
you (familiar)youto/for youof you
he/she/ithim|her|itto/for him|her|itof him|her|it
weusto/for usof us
you (familiar, pl.)youto/for youof you
you (formal)youto/for youof you
theythemto/for themof them

Common Verbs by Case

Accusative Verbs (take direct object)

  • sehen (see), kennen (know), brauchen (need), haben (have)
  • lieben (love), hören (hear), fragen (ask), besuchen (visit)
  • rufen (call), erwarten (expect), verstehen (understand)

Dative Verbs (take dative object)

  • helfen (help), danken (thank), antworten (answer), folgen (follow)
  • gratulieren (congratulate), gehören (belong to), gefallen (please)
  • glauben (believe), vertrauen (trust), passen (fit)

Verbs with Both (dative = person, accusative = thing)

  • geben (give), zeigen (show), schenken (give as gift)
  • erzählen (tell), erklären (explain), bringen (bring)
  • kaufen (buy), schicken (send), leihen (lend)

Quick Memory Tricks

Accusative changes:

  • ich → mich, du → dich, er → ihn
  • Everything else stays similar to nominative

Dative “m” pattern:

  • mir, dir, ihm, ihm (notice the “m” endings for singular)
  • Plural uses “n”: uns, euch, ihnen

Always the same:

  • uns (we/us/to us)
  • euch (you all in all cases except nominative where it’s “ihr”)
  • sie/Sie (feminine/plural/formal often stay “sie/Sie”)

References

https://en.wikipedia.org/wiki/German_declension