can be 与could beshe could be a teacher.为什么不是can be ?

can be 与could beshe could be a teacher.为什么不是can be ? may be 与could be ,can be,might be在表示可能性上的区别是什么? can could be able to She has to be in bed by ten.对by ten 提问 Please beShe has to be in bed by ten.对by ten 提问Please be quiet (改为否定句)They can see five dolphins there.对five提问. i can与i could的区别?有首歌叫i could be the one 和i can be the one 有何不同呢? be able to、can、could的区别 could it be与could that be 的区别是什么? The Referer could not be found (can be left blank). 在英语作文里could be 可以代替can be is no longer______she ued to beShe is no longer______she ued to be填什么 could与 can有什么区别? 英语翻译She was shy on the phoneBut she would still callAnd we would talk for hoursAbout nothing at all We would talk about love and lifeAnd discuss what we wanted to beShe knew just how I feltAnd how happy I could be be able to 和could/can 有什么分别 can,could和be able to的区别 i wish i could be you 这里的could能不能幻城can could与can,might与may有什么区别? how can this be和how could this be这两个有什麼区别.是不是could语气委婉些?还是过去式? Be a woman could weep but can not be lost with indifference get a better life