Last year ,he couldn't drive a car ,but now he can .为什么选couldn't,can?还有例句.

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Last year ,he couldn't drive a car ,but now he can .为什么选couldn't,can?还有例句.
Last year ,he couldn't drive a car ,but now he can .为什么选couldn't,can?还有例句.

Last year ,he couldn't drive a car ,but now he can .为什么选couldn't,can?还有例句.
can 是情态动词的原形,现在时,表示现在能做的事情.
could是can的过去式,表示过去能做的事情.