If I had known it earlier,I would have made preparations.问：我知道是虚拟语气,也知道翻译,我就问：主句I would have made preparations是什么时态,为什么要这样,有什么规律?

英语：1.I would have phoned you ,if I ___ time.( )A.had had B.have had C.had2.If I __ her tomorrow,I would pass your note to her.( )A.see B.shall see C.saw3.__,I'd have told you.( )A.If I would have known it B.If I had known it C.Had I known it4.T if i had it my I don't know whether to take the medicine at once.If I ______ ,I ______ itA.knew,would take B.had known,would have taken it C.knew,would have taken D.had known,would take have had done与had have done区别——，I'd have told you.A.If I would have known B.If I had have known C.Had I known D.Should I know 1,____ ,I would have phoned you ,a,if I knew it b,had I known it c,if I know it d,did I know it.2 ,it was because of bad weather_____ the football match had to be put off.a,so b,so that c why d,that 3,scarcely____ the room ___ the phone rang.a,I had If it had been known that,why the need for and at the beginning .If it had been known that,why the need for and at the beginning . had i known it ,i would have..HAD在句首? 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 （Were I） in your place,I would't give it up so earlyA：Were if IB:Were IC:Had I known D:If I knwe 为什么选B? 假如早知道我是个天才 IF I HAD KNOWN I WAS A GENIUS怎么样 If I_____that erlier,I wouldn't have made that mistake.A.know B.had known C.have known D.knew Stave said that if he had known how it worked,he would have been told 英语翻译If my father had known of it he would have died a second time. If I had known that,I could have helped you.had和known怎么都是过去式,have在这里是什么意思,为什么它不用过去式 英语翻译Today we buried our 20-year-old son,Jim.He was killed in a motorcycle accident on Friday night.How I wish 1 had Known when I talked to him last that it would be the last time:If I had only known 1 would have said “Jim,I love you and I He thought I had known the fact.But a____-,I knew nothing about it. I didn't continue to see the movie because I had known the [e ] of it If I had known it earlier,I would have made preparations.问：我知道是虚拟语气,也知道翻译,我就问：主句I would have made preparations是什么时态,为什么要这样,有什么规律?