when the earthquake come back,we can do better than them/ 如果将can换成be able to需要用将来时吗?

when the earthquake come back,we can do better than them/ 如果将can换成be able to需要用将来时吗?
when the earthquake come back,we can do better than them/ 如果将can换成be able to需要用将来时吗?

when the earthquake come back,we can do better than them/ 如果将can换成be able to需要用将来时吗?
需要,这个是典型的主将从现句式,既 主句将来时从句用一般现在时,比,在人称和时态上都较为灵活,can做情态动词基本上没有时态上的变化.而be able to如在意思上有将来、过去之意,要进行相应的时态变化.

当然需要了！！

需要用。