買う
反対語sell （売る）
buy a CD
♔基本buy a CD
CDを買う
⦣ buy＋名詞.
buy her a present
♔基本buy her a present
彼女にプレゼントを買ってやる
⦣ buy ABで「AにBを買ってやる」.
buy a present for her
♔基本buy a present for her
彼女にプレゼントを買ってやる
⦣ buy B for Aで「AにBを買ってやる」.
buy the book for two dollars
buy the book for two dollars
2ドルでその本を買う
We cannot buy health with money.
We cannot buy health with money.
金で健康は買えない.
How much did you buy that bike for?
How much did you buy that bike for?
その自転車を君はいくらで買ったの?
⦣ 意味の上でのつながりはfor how much（いくらで）であるがhowが疑問詞なのでhow muchが文頭に出る.
That antique shop buys anything.
That antique shop buys anything.
あの骨董こっとう店は何でも買う.
I bought this book at that store.
I bought this book at that store.
私はこの本をあの店で買った.
She has bought a beautiful coat.
She has bought a beautiful coat.
彼女はすてきなコートを買った.
⦣ 現在完了かんりょうの文. have助動❶
The American hotel was bought by a Japanese company.
The American hotel was bought by a Japanese company.
そのアメリカのホテルはある日本の会社に買い取られた.
⦣ 受け身の文. was助動❷ 