It's Saturday. I can play with my friends.
Class is over. I can have a rest.
I'm fine. I can walk home.
It's raining. I can't go home,because I didn't take umbrella this morning.
It's seven o'clock. I can't have my breakfast because I'm late for school.
You look so hungry. You can eat something first before working.
My mother is tired. She can't wash clothes for me, so I have to wash my clothes myself.
It's dark. I can't play outside anymore, because my mum will be worried about me.
表示可能It can be ture.
表示能力I can do it
不可能I can't agree with you. Fish can't live without water
if you like i can help you.
i can't remember it clearly.
What can you do?
No,I can't.