從時態來看，我們知道 “would” 是 “will” 的過去式，但除了時態使用上的不同，兩者是否還有其他用法及意義的不同呢？以下我們將針對 “will” 和 “would” 提出說明，並提供相對應的範例供您參考。
1. “Will” 可用來說明某人預測、相信未來會發生或是當下正在發生的事情：
He will make it to the meeting.
Where’s mom? She will be at work.
注意：當使用 “will” 敘述當下的事情時，和現在簡單式的用法會有些差異；大致來說，現在簡單式的敘述具有肯定性，而相較之下 “will” 則帶有一點預測、保留其他可能性的意味。
舉例來說，“Mom is at work” 意指 “媽在上班”，“Mom will be at work” 則帶有一點猜測的意味：“（沒意外的話）媽應該是在上班沒錯”。
而“would” 則代表在過去某時間點對未來的預測或敘述：
We thought he would make it to the meeting.
She thought she would be the one being promoted.
2. “Will” 可用來說明習慣、固定發生的事情：
The restaurant will usually open at 5 pm.
She will get up at 5 in the morning, drink a cup of coffee, put on her headphones with her favorite podcast on, and head out for a run.
而在這個用法下，“would” 是指在過去習慣、固定發生的事情：
The restaurant would usually open at 5 pm.{餐廳以前都是晚上五點開門。（意指現在餐廳已經不是五點開門了）}
She would get up at 5 in the morning, drink a cup of coffee, put on her headphones with her favorite podcast on, and head out for a run.{她以前都是早上五點起床，喝杯咖啡，戴上耳機聽著她最愛的播客，然後出門跑步。（意指現在她已經不再這麼做了）}
3. “Will” 也可用來敘述某人願意做的事情：
I had a fight with Ann, and she won’t talk to me now.
Parents will do everything to protect their children.
而 “would” 則意指某人在過去願意做的事情：
I tried apologizing to Ann, but she wouldn’t talk to me.
My mom would let us decide what we want to do.
4. “Will” 可用來敘述某人對未來所做的承諾：
I will get back to you as soon as possible.
OK, I will be there.
相同地，“would” 就能用來表達某人在過去對未來所做的承諾。
He said he would talk to her.
She promised she would come.
5. 另外，“will” 和 “would” 皆可用來對他人提出請求，但兩者的差異在於 “would” 更為禮貌和正式。
Will you open the window for me?
Would you open the window for me?
以上兩個句子的意思都是“你可以幫我開個窗戶嗎？”，但以 “would” 提出的請求更為禮貌。
6. 最後，“would” 也可以用來禮貌、委婉地表達個人的意見或是表達自己也不太確定的意見；常見的搭配用法有：“I would say/think/imagine” 等：
I would say it is quite a risky move.
I would imagine that the manager will call a meeting as soon as we get back to the office.
