i should have been there,but i()not find the time.求讲解,为什么用could,而不用would,should,might?

i didn't hear the phone.i asleep 为什么不是should have been? I should already have been mature I/we should have been working.是什么意思 19.I didn't hear the phone .I ______asleep .19.I didn't hear the phone .I ______asleep .A.must be B.must have been C.should be D.should have been 选B为什么为什么不选A I didn't hear the phone.I _____ asleep.A.must beB.must have beenC.should have beenD.could have been i should don't have pushed it Should Have Been 歌词 I should have never been there应该怎么翻译 i'm surprised that he should have been so foolish ------------for the heavy rain.i should have been here earlier A if it were not B were it notC had it not been D if it wasn't I want to say something,but I don't konw what I should say.I have been become carzy.Dear,I ...I want to say something,but I don't konw what I should say.I have been become carzy.Dear,I miss you,really!Whether you believe or not. 英语翻译Pure --Fool's Garden I can't understand what I have seen I can't recall where I have been Can't find the words I wish to say,I can't be near can't get away I cannot do the things I should,I wish I could I can't say where,I can't say when, 一道英语单选题分析I should be likely to have attended their wedding,but to my great disppointment,I____A,am not invitedB,wasn't invitedC,haven't been invitedD,wouldn't have been invited Thank you very much indeed.If it had not been for your advice I really what I should have done.A.don’t know B.didn’t know C.hadn’t known D.wouldn’t have known 独立主格结构That being my first visit to it,I didn't know where I should go first.being为什么不能换成to have been i am sorry,miss smith.ive broken your glasses. it doesnt matter,mike,but you__careful(should have been)为什么不填must be? 翻译I have been waiting for you for the ohers refused to in words I ain't is should lower himself I still haven't got the letter he sent to me a week ago.I wonder if the letter___ wrongly delivered[A] might be [B] might have been[C] should be [D] should have beenAnd reason,please.Thanks.