Accusative case
The accusative case mainly indicates a direct object, at which action is initiated.
In the accusative case all masculine nouns can be split into two huge groups: living - beings — animate.
Animate maculine nouns will have endings the same as genitive case
The second group includes (or comprises) inanimate things. In the accusative case singular inanimate masculine nouns will never change their form(…)
Masculine

Inanimate
Это большой дом, а это белый цвет [Yeto bol'shoy, a yeto belyj cvet] — It is big house, and it is a white color
Том видит большой дом [Tom vidit bol'shoy dom] — Tom sees big house
Анна любит белый цвет [Anna loves white color] — Anna loves white color
Animate
Это мой старый хороший друг [Yeto moj staryj khoroshiy droog] — He is my best friend
Вижу моего старого хорошего друга [Vidjoo moyevo starogo khoroshevo drooga] — I see my best friend
Neutral nouns in accusative case has no changes
Есть большое красивое окно [Yest' bol'shoye krasivoye okno] — There is a big beautiful window
Вижу большое красивое окно [Vidjoo bol'shoye krasivoye okno] — I see big beautiful window
Feminine nouns in the accusative case must have the ending «У» or «Ю»
Том любит свою сестру [Tom loobit svoyoo sistroo] — Tom loves his sister
Мария любит Россию и её историю [Maria loobit Russiyoo i eyo istoriyoo] — Mariya loves Russia and her history
Adjectives always have the same case as their nouns, it means that their endings will be relevant:
Том любит свою старшую сестру [Tom loobit svoyoo starooyu sistroo] — Tom loves his older sister
Иван видит большой красивый дом и своего старого друга [Ivan videt bol'shoy krasivyj dom i svoyevo starovo drooga]—
=Ivan saw big and beautiful building and his old friend
Plural form in accusative case also depended on type of noun group: is it animate or inanimate. Inanimate object on plural are equal with nominative plural.
Animate plural in accusative case is the same as in genitive case

Verbs with which we usually use accusative case:
идти [e:dte] = to go (one way) — ходить [khad'eat'] = to go (in two directions)
ехать [jekhat'] = to go by wheels (one way) — ездить [jezdeat'] = to go by wheels (there and back)
бежать [byedjat'] = to run (to somewhere) — бегать [begat'] = to run (anywhere)
летать [letat'] = to fly (anywhere) — лететь [letet'] = to fly (to somewhere)
любить (кого/что) [l'oobit'] — love
видеть (кого/что) [vidyet'] — to see
смотреть (куда; кого/что) [smotret'] — to watch
знать (что?) [znat'] — to know
понимать (кого/что) [ponimat'] — understand
спрашивать (кого/что) [sprashivat']— to ask
Prepositions for accusative case: в = (V); на = (NA); через = (cherez)