Unit 2 Sports events Grammar and usage课件(牛津译林版必修4)
Unit 2 Sports events  Grammar and usage课件(牛津译林版必修4)第4页

can/be able to

ability

在过去时态的肯定句中需要某种条件或努力做成某事,我们要用was/were able to而不能用could。如: It was a holiday and the children were able to go to the seaside. The girl worked hard so she was able to pass the final test. I’m sorry I haven’t been able to play tennis with you recently.