say 　speak　speech

speech是尤指演說或者朗誦、講座等 (沒有跟人對話的), e.g. "she is giving a speech"
say是用於比較casual的, 像你對誰人說話、想跟他說些什麼等.
speak是"speak a language", "speak up", 或者專指「講話」, 如 "she is speaking" (她在說話)而不是"she is saying" (她在說) <---因為"she is saying"是指"她在說xx", 所以say之後一定要有下文. speak之後不用下文, 只指某人在講話.

等我慢慢解釋比您聽：




say
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釋義
同義字/反義字
變化形

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KK: [
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DJ: [
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vt.
1. 說,講,唸,誦
The doctor said she would be all right in a few days.
醫生說她過幾天就會好的。
How do you say this in English?
這在英語中怎麼說?
2. 講述;說明[+(that)][+wh-]
3. 表明,指明
4. 假定,假設[+(that)]
Let's say you miss the train, what do you plan to do?
假定你趕不上火車,你準備怎麼辦?
5. (常用作插入語)比如說,例如;估計;約莫
You may learn to play the violin in, say, three years.
你可以,比如說,在三年內學會拉小提琴。
6. (人們)認為,聲稱[H][+(that)][O2]
It is said that there has been a serious earthquake there.
據說那裡發生了一次大地震。
7. 【口】揭示;吩咐[W][+to-v]
Mom said to tell you you should take three pills after dinner.
媽關照飯後你得吃三片藥片。
vi.
1. 說,講;發表意見
It's not for me to say.
這不應由我發表意見。
n.
1. 發言權[S][(+in)]
I don't think he has much say in this matter.
我想他在此事上不大有發言權。
2. 要說的話,意見[S]
I've had my say.
我要講的都講了。
3. 決定權[the S]
int.
1. 喂,哎呀







speak
標示解釋




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釋義
同義字/反義字
變化形

圖片參考：http://hk.yimg.com/i/dic/dreye02.gif





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KK: [
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DJ: [
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vi.
1. 說話,講話
He wanted to speak to me.
他想和我說話。
2. 談話,談論
I have not spoken to him on this subject yet.
我還沒有和他談這件事。
3. 發表演說,陳述意見
It was the first time that I spoke in public.
這是我第一次在公共場合發言。
4. 發出信號
5. 顯示,傳達
Actions speak louder than words.
行動勝於言辭。
6. (樂器,槍等)響起;(狗等)吠叫
7. 保持友好交往
They are no longer speaking after the quarrel.
他們爭吵後不再交往。
8. 有吸引力
9. 提要求,請願
vt.
1. 說(話);說出
Miss Li speaks good English.
李小姐英語講得很好。
I'm sure he's speaking the truth.
我相信他講的是真話。
2. 陳述,表達
3. (眼神等)顯示
Her face spoke disappointment.
她的臉色顯示出失望。
4. 跟...談話
5. (鐘聲等)宣告
6. 背誦(臺詞)
The actress spoke only three lines in the first act.
在第一幕中這位女演員只有三行臺詞。
7. (用旗語等)與...聯絡






speech
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釋義
同義字/反義字
變化形

圖片參考：http://hk.yimg.com/i/dic/dreye02.gif





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KK: [
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DJ: [
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n.
1. 說話能力[U]
Animals lack speech.
動物不會說話。
2. 說話,言詞,言論[U]
We express our thoughts by speech.
我們用言語表達思想。
3. 演說,演講,致詞[C][(+on)]
The chairman made an opening speech.
主席致開幕詞。
4. 說話方式,口音
By your speech I can tell you're from Hong Kong.
聽你的口音,我能知道你是香港人。
5. 民族語言;方言;專門語言[C][U]
6. (演員的)臺詞[C]
7. (作為學科的)演講法,辯論術[U]
8. 【文】詞(類);敘述法[U]