非常不错的情态动词课件,很到位,符合任何高中学生使用
(1) ability平时的能力：能，会 I can speak Japanese,but I can`t write it. He could swim when he was 4 years old. can&could/be able to 的区别： a)be able to有很多时态，而can只有一般现在是和 过去时could. At this time of next year,I will be able to support myself.Able to solve the problems myself,the student didn`t worry about exam at all.
b)be able to还指具体的某次能力=succeed (in) doing sth Yesterday Tom was able to arrive on time. c) 否定句中was/were not able to do=could not do sth