nothing could have been more embarrassed还是embarrassing

nothing could have been more annoying Nothing could have been more annoying. 时态Nothing could have been more annoying Nothing could have been more annoying.这句话里加have Nothing could have been more annoying是什麼时态? nothing could have been more annoying是什麽意思 修饰smiile用哪种 embarrassed smile还是embarrassing smile Nothing could have been more annoying.请帮我把这句话改成there be句型. Nothing could have been more annoying.这里用的是现在完成进行式表示的是什么意思? Could you have been more careful Why ,what wrong__I__? ---------(give)more attention ,the accident could have been have you ever been embarrassed when ____ talking to yourself