定冠詞"the"

He plays the guitar. ギターがobjectなのでtheをつける
He plays music. 音楽はobjectでないのでtheをつけない

冠詞・所有格代名詞

名詞の前に冠詞a(an)をつける意識ができたらa(an)かtheかmy(who)のどれか考慮
Can I get my e-book reader back?
Do you have an e-book reder?
I need the e-book reder.
You need some books.
Do you have any idea?
定冠詞：the
不定冠詞：a(an), some, any
所有格代名詞：my/your/his/her/its/Mike's/our/your/their