Cách dùng Can

Can
“Can” là một trong những động từ khiếm khuyết được sử dụng phổ biến trong Tiếng Anh.Nó có thể được sử dụng để thể hiện khả năng hay cơ hội, để yêu cầu hoặc sự cho phép, và cho thấy khả năng hay không có thể.
Examples:
I can ride a horse. (Khả năng )
We can stay with my brother when we are in Paris. (cơ hội)
She cannot stay out after 10 PM. (sự cho phép)
Can you hand me the stapler? (đề nghị)
Any child can grow up to be president. (khả năng)
Using "Can" in Present, Past, and Future
Most modal verbs behave quite irregularly in the past and the future. Study the chart below to learn how "can" behaves in different contexts.
Modal Use
Positive Forms 1. = Present   2. = Past   3. = Future
Dạng phủ định 1. = Present   2. = Past   3. = Future
Bạn cũng có
thể dùng :

can nói chung khả
năng
1. I can speak Chinese.
2. SHIFT TO "COULD" I could speak Chinese when I was a kid.
3. SHIFT TO "BE ABLE TO" I will be able to speak Chinese by the time I finish my course.
1. I can`t speak Swahili.
2. SHIFT TO "COULD" I couldn`t speak Swahili.
3. SHIFT TO "BE ABLE TO" I won`t be able to speak Swahili.
be able to

can khả năng trong một sự kiện cụ
thể
1. With a burst of adrenaline, people can pick up cars.
2. SHIFT TO "BE ABLE TO" With a sudden burst of adrenaline, he was able to lift the car off the child`s leg.
3. SHIFT TO "BE ABLE TO" With a sudden burst of adrenaline, he will be able to lift the car.
1. Even with a burst of adrenaline, people can`t pick up something that heavy.
2. SHIFT TO "BE ABLE TO" Even the weight lifter, couldn`t lift the car off the child`s leg.
3. SHIFT TO "BE ABLE TO" Even three men working together won`t be able to lift the car.
be able to

can cơ hội
1. I have some free time. I can help her now.
2. SHIFT TO "BE ABLE TO" I had some free time yesterday. I was able to help her at that time.
3. I`ll have some free time tomorrow. I can help her then.
1. I don`t have any time. I can`t help her  now.
2. SHIFT TO "BE ABLE TO" I didn`t have time yesterday. I wasn`t able to help her at that time.
3. I won`t have any time later. I can`t help her then.
be able to

can sự cho phép
1. I can drive Susan`s car when she is out of town.
2. SHIFT TO "BE ALLOWED TO " I was allowed to drive Susan`s car while she was out of town last week.
3. I can drive Susan`s car while she is out of town next week.
1. I can`t drive Susan`s car when she is out of town.
2. SHIFT TO "BE ALLOWED TO " I wasn`t allowed to drive Susan`s car while she was out of town last week.
3. I can`t drive Susan`s car while she is out of town next week.
may

can lời đề nghị
Can I have a glass of water?
Can you give me a lift to school?
Yêu cầu thường nhắc đến.
Can`t I have a glass of water?
Can`t you give me a lift to school?
Yêu cầu thường nhắc.
could, may

can khả năng không có thể
Anyone can become rich and famous if they know the right people.
Learning a language can be a real challenge.
This use is usually a generalization or a supposition.
It can`t cost more than a dollar or two.
You can`t be 45! I thought you were about 18 years old.
This use is usually a generalization or a supposition.
could