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could
01
能, 可以
used as the past tense of ‘can’
02
你可以, 你能吗
used to ask if one can do something
Transitive
03
可以, 能够
used to show the possibility of something happening or being the case
Transitive
04
可以, 能够
used to present an offer or recommendation
Transitive
could
v
例子
Before the accident, he could lift heavy weights easily.
He could solve complex math problems effortlessly in his youth.
Yesterday, I could see the stars clearly in the night sky.
When I was a child, I could climb trees without any fear.
When I was younger, I could run faster.