think同want這兩個字的分別在那裏

think意解(1)思考、考慮，或者(2)認為
(1) He's thinking about the question 他在思考那道問題
(2) I don't think it's a waste of time doing this. 我不認為做這件事情是浪費時間

want則是想要、希望的意思
eg. I want to go home 我想回家
What do you want? 你想要什麼？

再舉一個例子
「我在想晚餐該吃什麼 (I'm thinking what to have for dinner)」和「我想吃晚餐 (I want to have dinner) 」當中的兩個「想」字，意思也很不一樣了

Think

1. 想;思索[+wh-]
Think how much you can earn if you open a restaurant in such a good location.
想一想,要是你在這樣的黃金地段開一家餐館,你會賺多少錢啊。

2. 認為,以為
We thought it our duty to take care of the orphans.
我們認為照顧這些孤兒是我們的職責。
They thought the novel worth reading.
他們認為這本小說值得一讀。
I think he will come.
我想他會來的。

3. (常與cannot, could not連用)想像;理解[+wh-]
I can't think what you mean.
我不懂你是什麼意思。
I can't think why they left without saying good-bye.
我不明白他們為什麼不告而別。

4. 記憶,想起[+wh-]
I can't think what his phone number is.
我記不起他的電話號碼是多少。

5. 想要,打算[+to-v][+(that)]
At first he thought to tell her, then he changed his mind.
他原來打算告訴她的,後來改變主意了。

6. 預料,料想[+(that)][+to-v]
I didn't think to land myself in trouble.
我沒想到會使自己陷入困境。

vi.
1. 想;思索[(+about)]
Think before you leap.
先思而後行。
2. 認為
Do as you think best.
你認為怎樣最好就怎樣去做。

Want
1. 要,想要[+to-v][O2][O7][O8][O4]
I don't want my daughter taken out after dark.
我不願有人在天黑以後帶我女兒外出。
He wants you to see him in London without fail.
他要你務必在倫敦見他。
Somebody wants to see you.
有人想見你。

2. 想見;要求(某人)來;想用(某人)[H]
You're wanted on the phone.
有你的電話。

3. 緝拿,追捕[H][(+for)]
The robber is wanted by the police.
警方在通緝那個強盜。

4. 需要[+v-ing]
Your coat wants washing.
你的衣服該洗了。
What you want is a holiday.
你所需要的是假期。

5. 【口】應該[Y][+to-v]
You want to tell him the truth.
你應該把實情告訴他。

6. 缺乏,缺少
He certainly does not want intelligence.
他當然並不傻。

vi.[W]

1. 缺乏,缺少;需要[(+for)]

2. 生活困苦,貧困
The opera star wanted in her later years.
那位歌劇明星晚年生活困苦。

n.
1. 需要的東西;必需品[P1]

2. 缺乏,不足[U][(+of)]
He did not get the promotion for want of judgment.
他因缺乏判斷力而未獲提升。

3. 匱乏,貧困[U]

4. 需要[U]

2008-06-25 13:11:33 補充：
Try to "THINK"

think多指認為，want 指希望
i want to have some ice cream
中文雖仍譯我想吃冰淇淋，但此想是指希望得到，絕不能用think
i think ice cream is delicious
我認為冰淇淋很好吃

THINK

1. 想;思索[+wh-]
Think how much you can earn if you open a restaurant in such a good location.
想一想,要是你在這樣的黃金地段開一家餐館,你會賺多少錢啊。
2. 認為,以為[O8][O9][+(that)][O2]
We thought it our duty to take care of the orphans.
我們認為照顧這些孤兒是我們的職責。
They thought the novel worth reading.
他們認為這本小說值得一讀。
I think he will come.
我想他會來的。
3. (常與cannot, could not連用)想像;理解[+wh-]
I can't think what you mean.
我不懂你是什麼意思。
I can't think why they left without saying good-bye.
我不明白他們為什麼不告而別。
4. 記憶,想起[+wh-]
I can't think what his phone number is.
我記不起他的電話號碼是多少。
5. 想要,打算[+to-v][+(that)]
At first he thought to tell her, then he changed his mind.
他原來打算告訴她的,後來改變主意了。
6. 預料,料想[+(that)][+to-v]
I didn't think to land myself in trouble.
我沒想到會使自己陷入困境。
vi.
1. 想;思索[(+about)]
Think before you leap.
先思而後行。
2. 認為
Do as you think best.
你認為怎樣最好就怎樣去做。

WANT

1. 要,想要[+to-v][O2][O7][O8][O4]
I don't want my daughter taken out after dark.
我不願有人在天黑以後帶我女兒外出。
He wants you to see him in London without fail.
他要你務必在倫敦見他。
Somebody wants to see you.
有人想見你。
2. 想見;要求(某人)來;想用(某人)[H]
You're wanted on the phone.
有你的電話。
3. 緝拿,追捕[H][(+for)]
The robber is wanted by the police.
警方在通緝那個強盜。
4. 需要[+v-ing]
Your coat wants washing.
你的衣服該洗了。
What you want is a holiday.
你所需要的是假期。
5. 【口】應該[Y][+to-v]
You want to tell him the truth.
你應該把實情告訴他。
6. 缺乏,缺少
He certainly does not want intelligence.
他當然並不傻。
vi.[W]
1. 缺乏,缺少;需要[(+for)]
2. 生活困苦,貧困
The opera star wanted in her later years.
那位歌劇明星晚年生活困苦。
n.
1. 需要的東西;必需品[P1]
2. 缺乏,不足[U][(+of)]
He did not get the promotion for want of judgment.
他因缺乏判斷力而未獲提升。
3. 匱乏,貧困[U]
4. 需要[U]