如何用can,could,be able to 呀！！

1.can
(表示能力,功能)能,會
The classroom can seat thirty students.
這教室能坐三十位學生。
June can drive now.
朱恩現在會開車了。

2. could
can的過去式
She could play the violin when she was five.
她五歲時便能拉小提琴了。
or (用於假設語氣,表示與事實相反的設想)能,可以
I wish I could go to France.
但願我能去法國。
I would go if I could.
能去我就去。

3.be able to
能
The athlete is able to jump two meters.
這位運動員能跳兩米高。

Mary can swim fastly
He could play the piano when he was five
I am able to run 100 meters within 15 secs