have been v+ed / have v+ed 的区别

have been v+ed / have v+ed 的区别 have been+v.ed是什么时态,我看有说是现在完成时,那么,它和have+v.ed有没有什么区别,哪位知道给说说, --that car must have cost a lot of money.--on,no._________请问否定回答用 it didn't 还是用 it can't.不过记得是这样的 must have v-ed 否定形式为：can’t / couldn’t have v-ed,为什么又用it didn't 还是与can't/couldn't hav HAV BEEN DOING STH为什么要加BEEN? 英语问题 have+ed和 have+been+ing 的区别,和他们的意思,求详解 having been +V-ed 和v-ed做状语的区别Not having completed the programme,they have to stay there for another two weeks.when completed ,the museum will be open to the public next year.这里的completed 和having completed 可以互换吗?都是 翻译At any rate, it would have been just if Ed had lost. have been ＋v.ing是神马意思 怎么用 请问什么是不定式完成式,不定式不是to”吗,那不定式完成式就是to +have +v-ed continue to have dreams,continue to hav 中文意思? V-ed和having been v-ed的区别when completed ,the museum will be open to the public next year.中的completed能用having been compled 互换吗?它们都是表示过去被动吧. what hav u been doing的been是干吗的?总觉得没必要. many thousands of people have been infected with the virus.为什么infect要加ed,是因为他是被动语态吗?凡是被动语态动词都要加ed吗? 英语翻译In the last years,several vehicles — with different problems — have been equipped withactive absorber systems to attenuate the transmission of the engine vibrations into thevehicle cabin.As mentioned earlier,the control algorithms hav Confucius said, “Since the age of 15, 翻译Confucius said, “Since the age of 15, I have devoted myself to learning; since 30, I have been well established; since 40, I have understood many things and have no longer been confused; since 50, I hav have been have been have been