可以呀!下邊是兩者的區(qū)別：
1）can could 表示能力；可能 (過去時(shí)用could),
只用于現(xiàn)在式和過去式(could).be able to可以用于各種時(shí)態(tài).
They will be able to tell you the news soon.他很快就能告訴你消息了.
2）只用be able to
a.位于助動詞后.
b.情態(tài)動詞后.
c.表示過去某時(shí)刻動作時(shí).
d.用于句首表示條件.
e.表示成功地做了某事時(shí),只能用was/were able to,不能用could.
He was able to flee Europe before the war broke out.
= He managed to flee Europe before the war broke out.
注意：could不表示時(shí)態(tài)
1）提出委婉的請求,（注意在回答中不可用could）.
--- Could I have the television on?
--- Yes,you can./ No,you can't.
2）在否定,疑問句中表示推測或懷疑.
He couldn't be a bad man.
他不大可能是壞人.