[place] に [noun] があります。
= [place] ni [noun] ga arimasu.
= There is/ are [noun] at [place]
*[noun] must be a non-living object/ plant.
- There are many boxes in this room. = kono heya ni takusan hako ga arimasu. = この部屋にたくさん箱があります。(heya= room; takusan= many; hako= box)
- There is a pencil on the table. = teberu no ue ni ippon enpitsu ga arimasu. = テベルの上に一本エンピツがあります。(teberu= table; ue= top; ippon= 1 long object - *it's a counter; enpitsu= pencil)