一 表能力Can /be able to 表现在的能力； will be able to 表将来的能力；could/was/were able to 表过去的能力如：I am starving to death. I can eat two bowls of rice now.现在的能力If you have a good sleep, you will be able to work out this problem.将来的能力The fire spread through the hotel very quickly but everyone was able to get out.（过去有能力做并且成功地做了某事）I could have worked out the problem, but I didnt .（过去有能力做但未做）单项选择I should have been there,but I _not find the time.A. would B. could C. might D. shouldIn sp
