Questions & Answers about После ужина я вымыл тёрку и убрал её в шкаф.
Because после requires the genitive case.
- ужин = dinner
- ужина = of dinner / after dinner
So:
- после ужина = after dinner
- после работы = after work
- после фильма = after the film
This is a very common pattern: после + genitive.
Because тёрку is in the accusative case, since it is the direct object of вымыл.
Dictionary form:
- тёрка = a grater
In this sentence:
- я вымыл тёрку = I washed the grater
For many feminine nouns ending in -а, the accusative singular changes to -у:
- книга → книгу
- лампа → лампу
- тёрка → тёрку
So the ending changes because the grater is the thing being washed.