我想問would同will有咩分別?(十萬火急)20點

Beside being the past tense of will, would also has the following meanings which will does not possess :

1. express one’s willingness :
I told you I would like to go to the party, no matter whether you like or not.

2. showing habit that one does not have anymore :
My father would always talk about his tour to Europe , until we are tired of hearing that.

3. to predict :
I believe he would accept my offer.

4. express a wish or preference :
I would like to have cheese cake as dessert for dinner tonight.


5. suggesting something out of supposing or conditioning :
I would join you if you can change the lunch meeting to Friday.

6. express an appeal indirectly :
Would it be possible for me to have a dinner with you tonight ?

7. express a wish :
I wish I were young enough to stay up overnight like you young folks do.

8. a word to show the ability (mostly about things, not human) :
This room would seat 100 people.

would 同will有小小分別,would 係用係禮貌ge方面,例如: Would you like to have some......../I would like......../I wouldn't like..........就係甘用多D。
而will 就通常跟if 一齊用ge,例如:You will see some special birds if you go to Mai Po Marshes.........

will 同 would 冇分別？我以為其碼有人會講得出 would 係 will o既 past tense form。
留意，will 用於指出一個決定，講出想將來做o既事。如：
I will go home first, then we will meet at 5pm at the cinema.
但 would 就唔會用於呢個情況（除非係用作 will o既 past tense 時）。past tense 有委婉之意，將語氣減弱，無咁直接，正如用於講可能性時， could o既可能性比 can 低。
因此，用 would 提出要求係比較婉轉，亦令人覺得較有禮。如：
Will you do that for me, please? 只用於熟朋友間
Would you do that for me, please? 就較委婉，無咁熟或要求較難做時用
would 亦係用於表達意願，呢個意思 will 就冇。如：
I would like to ask you out for dinner. （絕不能講 I will like...）

In my opinion,there seems to be no difference between these 2 words.

I don't know whether the followings are sorts of difference:

If I were you,I would not buy this expensive yet useless box.
(Conditional sentence II )

Would you mind passing me that dish of fish?
(I've never seen 'will' is used in such pattern)