a Particle
Location
particle can denote a location of existence 幼稚園に子供がいる There are children in the kindergarten
Direction
into (...)
Arguably similar to direction, but less about actual space. think of grammap points like In order to (...), ためになる
Indirect object
used to denote an indirect object as a target (e.g. when giving something to someone)
私がボールを妹に投げた I threw a ball to at/to my sister.
in order to do (...)
expresses the aim of motion: the why of your doing something.
It functions almost identical to ために, but sounds more neutral.
#verb〜 with the i-stem.
買い物をしに来た I came here in order to do shopping.
家へ休みに帰りました。 I went home so that I could take a rest.
お父さんは仕事しに行った My father went in order to do go do work
AにはBがある
Literally like the latin mea canis est, a genitivum possesion, but now with に Literally 'To me there exists a (...)'
あたしにはボーイフレンドがいる I have a boyfriend.
彼には家もある He even has a house.
形容動詞 adverb
When used形容動詞＋ な→に: adverb
真面目に勉強する Studying seriously.
Into (...)
mostly for にする・になる,