I have been dreaming.That's why I didn't see.That's why可以用so来替换吗?That's why的原形,That's why是短语吗？

I have been dreaming of I must have been dreaming.(改为否定） I have been dreaming to be a teacher all the time.all the time 和have been doing是否重复? i must have been dreaming 的语法结构怎么分析呢? He must have been dreaming为什么加ingHe must have been dreaming中的 dream为什么加ingHe was not dreaming中的 dream为什么加ing Dreaming I Was Dreaming 歌词 Are you really here or am I dreaming?I can't tell dream from truth For it's been so long Since I have seen you I can hardly remember your face anymore When I get pretty lonely I have been selling I have been trying I have ever been I too have been I have been to. I have been I have been in. Dreaming I Was Dreaming (Subconscious) 歌词 In this experiment,they are woken up several times during the night,and asked to report what they_.A.had just been dreaming B.are just dreaming C.have just been dreaming D.had just dreamt怎么不能选D I have been dreaming.That's why I didn't see.That's why可以用so来替换吗?That's why的原形,That's why是短语吗？ 求一篇300字的英文故事 开头必须是it seems like i have been dreaming of thisday all my life.everyone said it was impossible but here i am...