1.A good lawyer might be able to get you off.
请位好律师有可能使你免受追究
2.You should be able to hear us from the chapel.
你从小礼拜堂里应该能听到我们的声音.
3.We will never be able to understand it,but we can believe it anyway.
我们从来没有能力去明白,但是我们无论如何都可以去相信.
be able to 后加动词原形
当然be可以进行变化e.g.i'm able to deal with the problem.