“Can” and “could” are both modal verbs that are used to express possibility or ability.
「Can」和「could」都是用來表示可能性或能力的情況動詞。
“Can” is used to express that someone has the ability to do something, or that something is possible. It can be used to ask for permission, to offer help, or to request that someone do something. For example:
「Can」用來表示某人有能力做某事，或者某事是可能的。它可以用來請求許可、提供幫助，或者要求某人做某事。例如：
- Can you help me with this? 你能幫我這個嗎？
- I can speak Spanish. 我能說西班牙語。
- Can I borrow your pen? 我能借你的筆嗎？
“Could” is used to express a possibility or to make a request in a more polite or formal way. It is often used to express past ability or to ask for permission in the past. For example:
「Could」用來表示可能性或以更禮貌或正式的方式發出請求。它常用來表示過去的能力或請求許可。例如：
- Could you pass the salt, please? 請問能給我鹽嗎？
- I could swim when I was younger. 我年輕時能游泳。
- Could I have a glass of water? 能給我一杯水嗎？
In general, “can” is more common in spoken English, while “could” is more common in written English. However, both forms can be used in either context.
一般來說，”can” 在口語中更常用，而 “could” 在書面語中更常用。但是，兩種形式都可以在任何情境中使用。
和 都是用來表示可能性或能力的情況動詞。
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