资讯

历史

科技

环境与自然

成长

游戏

财经

文学与艺术

美食

健康

家居

文化

情感

汽车

三农

军事

旅行

运动

教育

生活

星座命理

Can, Could, Be Able to用法详解

创作时间:

作者:

@小白创作中心

Can, Could, Be Able to用法详解

引用

来源

https://pushtolearn.com/grammar/grammar-exercises-b1/can-could-be-able-to

Can, Could, Be Able to 练习

这些练习重点讲解了如何使用Can、Could和Be Able to来表达能力和可能性。

"Can"、"Could"和"Be Able To"的区别

形式	用法	例句
Can	表示现在或一般能力、许可或可能性	She can swim very well.（能力）
Could	表示过去能力、礼貌请求或可能性	When I was five, I could ride a bike.（过去能力）
Be able to	所有时态；正式场合	He will be able to help tomorrow.（将来能力）

如何使用"Can"

✅ "Can"表示现在能力

I can speak three languages.
She can run 5 km without stopping.

✅ "Can"表示可能性

It can get very cold in winter.
This road can be dangerous at night.

✅ "Can"表示许可

Can I leave early today?
You can take a break now.

🚨 常见错误：
❌ I can to swim.（错误）
✅ I can swim.（正确 - "can"后面跟原形动词）

如何使用"Could"

✅ "Could"表示过去能力

When I was a child, I could run very fast.
She could play the piano when she was five.

✅ "Could"表示礼貌请求

Could you help me, please?
Could I borrow your pen?

✅ "Could"表示可能性

It could rain later, so take an umbrella.
That could be the answer to our problem.

🚨 常见错误：
❌ I could to play the guitar.（错误）
✅ I could play the guitar.（正确 - "could"后面跟原形动词）

如何使用"Be Able To"

✅ "Be Able To"表示现在和将来能力

She is able to solve complex math problems.
He will be able to join us next week.

✅ "Be Able To"表示过去能力（特定情况）

I was able to fix my car yesterday.
She was able to escape from the burning building.

🚨 "Be able to"经常在"can"不能使用的时态中替代"can"。

时态	"Can"	"Be able to"
现在	She can swim.	She is able to swim.
过去	She could swim.	She was able to swim.
将来	❌（不可能）	She will be able to swim.

🚨 常见错误：
❌ I will can help you tomorrow.（错误）
✅ I will be able to help you tomorrow.（正确 - "be able to"用于将来能力）

常见错误及纠正

错误	纠正	原因
❌ I can to dance.	✅ I can dance.	"Can"后面跟原形动词。
❌ I will can go.	✅ I will be able to go.	"Can"不能用于将来时。
❌ I was able to run fast when I was a child.	✅ I could run fast when I was a child.	"Could"用于一般过去能力。