will/would

Will 係表示將來發生的事
例如: I will have a test tomorrow.

Would 係 will 的 past tense
例如: I told you yesterday that I would see the doctor next week

昨天告訴你我下星期會見醫生

咁講係昨天...但表達的事係將來就會用would

另外would代表禮貌及would you like=想不想??

Would you help me?
Would you like to help me?

will 個 past tense 係would
同樓上一樣,,
講現在既就用will,,
i will do the homework tomorrow.
講返past d野就用 would,,
i would go home if i know this.

but另外有一點要補充係will既可能性(possibility)比would大
would什至係冇可能,,
e.g. if i were you, i would not do that.
我冇可能係你,,所以要用would but not will
e.g you will feel happy.
你會開心既可能性大,,所以用will not would =]

仲有一點既就係當係你問人可唔可以點既時候,,會用would,,
表示禮貌:::
would you please help me to switch on the fan?

hope it can help you