英和辞典
  
why小A1
(h)wái(ホ)ワイ
副詞
❶なぜ, どうして
Why are you late?
♔基本Why are you late?
君はどうして遅おくれたのですか.
✓POINT
You are late why. (君は「なぜ」遅れた)が疑問文になって Are you late why? さらに why が文頭に出て Why are you late? となる.
Why is he absent?—Because he is sick.
会話Why is he absent?—Because he is sick.
なぜ彼は休みなのか.—病気だからです.
  ⦣ 理由を答える時は Because ~.
I'm very happy now.—Why?
会話I'm very happy now.—Why?
私は今とてもうれしいんだ.—どうして?
Why do you want a new camera?
♔基本Why do you want a new camera?
君はなぜ新しいカメラが欲ほしいの?
✓POINT
You want a new camera why. (君は「なぜ」新しいカメラが欲しい)が疑問文になって Do you want a new camera why? さらに why が文頭に出て Why do you want a new camera? となる.
Excuse me, sir! You mustn't park your car here.—Why not?
会話Excuse me, sir! You mustn't park your car here.—Why not?
すみません, ここに駐車ちゅうしゃしてはいけないのですが.—どうしていけないのですか. Why not?
Why is he absent this morning?—I don't know why he is absent.
会話Why is he absent this morning?—I don't know why he is absent.
なぜ彼は今朝休んでいるのですか.—彼がなぜ休みなのか私は知りません.
  ⦣ why 以下は文の一部に組み入れられるとこの語順になる.
Why do you think he is absent?—I think he is sick.
会話Why do you think he is absent?—I think he is sick.
なぜ彼が休んでいると思いますか.—彼は病気なのだと思います.
  ⦣ Yes, No の答えを求めない疑問文ではこの語順になる. 前例との違ちがいに注意.
❷the reason why+文でなぜ~するかという理由
文法 ちょっとくわしく
前にある reason (理由)を修飾しゅうしょくする関係副詞用法. why か the reason のどちらかが省略されることがある.
This is the reason why he is absent.
This is the reason why he is absent.
これが彼が欠席している理由です.
I want to know the reason (why) you were absent yesterday.
I want to know the reason (why) you were absent yesterday.
君が昨日欠席した理由を知りたい.
That's (the reason) why everyone likes him.
That's (the reason) why everyone likes him.
それがみんなが彼を好きな理由です[そんなわけでみんな彼を好きなんです].
I can see why.
I can see why.
理由がわかります.
  ⦣ why 以下が省略された形.
間投詞
おや, なに, まあ, でも, ええ  ⦣ 驚おどろき・反対または単に言い始めのきっかけとして使う.
Why, look, it's Takeshi.
Why, look, it's Takeshi.
おや, ねえ見てよ, タケシだわ.
Going out? Why, it's already dark.
Going out? Why, it's already dark.
出かけるの? でも, もう真っ暗だよ.
Do you want to come, too, Bob?—Why, yes!
会話Do you want to come, too, Bob?—Why, yes!
ボブ, 君も来たい?—ええ, もちろん.
Why don't you do?Why not do?Why not ~?Why don't you do? = Why not do? = Why not ~?
Why don't you do? = Why not do? = Why not ~?
~してはどうか, ~しませんか  ⦣ 親しい人に提案したり, 申し出たりするくだけた言い方. 自分も含ふくめて言う時は Why don't we do?
Why don't you [Why not] come and see us someday?
Why don't you [Why not] come and see us someday?
いつかうちに遊びに来ないか.
When shall we go to the movie?—Why not sometime next week?
会話When shall we go to the movie?—Why not sometime next week?
いつその映画を見に行こうか.—来週のいつかはどう?
Why not?Why not?
Why not?
なぜだめなのか; いいじゃないの, そうしなさいよ, もちろんさ
May I invite Kay?—Why not? She is a nice girl.
会話May I invite Kay?—Why not? She is a nice girl.
ケイを招待してもいい?—もちろんよ. あの子はいい子だもの.