YOU SAID:

trees are really tall

INTO JAPANESE

木は本当に高いです

BACK INTO ENGLISH

the tree is really tall

INTO JAPANESE

その木は本当に高いです

BACK INTO ENGLISH

that tree is really tall

INTO JAPANESE

あの木は本当に高いです

BACK INTO ENGLISH

That tree is really tall

INTO JAPANESE

あの木は本当に高いです

BACK INTO ENGLISH

That tree is really tall