07課 こ・そ・あ 教科書 p.134
こ / そ / あ
接続：これ・それ・あれ／この・その・あの
distinguishing the こ・そ・あ system. こ close to the speaker; そ close to the listener or just mentioned; あ far from both or common memory.
注意 / Note：Check the correct front form, subject and level of politeness; Don't just translate word for word.
比較 / Compare：Compare with structures in the same lesson to choose according to function in the whole sentence.
この本は私のです。
This book is mine.
そのかばんはあなたのですか。
Is that bag yours?
あの山は富士山です。
That mountain is Fuji.