(Negative sentence)
I/He can't swim
(Negative sentence)
I can't speak Chinese
(Positive sentence)
I/He can swim
(Positive sentence)
I/He can run
(Positive sentence)
I can speak Chinese
(Positive sentence)
He can do gymnastics
(Negative sentence)
I/He can't run
(Positive sentence)
He can climb
(Negative sentence)
I/He can't cook
(Negative sentence)
I/He can't cook
(Negative sentence)
I/He can't paint
(Positive sentence)
I/He can paint
(Positive sentence)
She can make a cake