&：Try as he might ,he failed.为什么要用try as这种形式阿?as try tried as 为什么不能用啊?

Try as he may,he might fail as well. try as he might怎么翻译,是什么句式如题 ----,he still failed in the examA try as he might B as he might try C tried as he D might try as he 选啥啊,最好能说明理由 &：Try as he might ,he failed.为什么要用try as这种形式阿?as try tried as 为什么不能用啊? Try as he would,he might fail again.为什么是Try而不是tries呢?不是第三人称人数吗? ___ ,I couldn't lift the box .A.As I might try B.Try as I might C.As try I might D.Try though I might .1 ________,I couldn’t lift the box.A)As I might try B)Try as I might C)As try I mightD)Though try I might 2_________ ,I’ll love him all the same.　　A)He were rich or poor 　　B)Be he rich or poor 　　C)Being rich or poor 　　D)Were he r Try as I might ,I could not lift the stone.和Try as he would,John could not remember a word.这两句中as的语法功能是一样的吗?这两句中的might和could又应该是怎样用的呢? Although he tried,he couldn't solve the problem.→Try as he might,he couldn't solve the problem.Although he tried,he couldn't solve the problem.→Try as he might,he couldn't solve the problem.尽管他努力了,但是他没有解决问题.倒装后 try as she might ,Mary couldn't get the box try as I might、i might as try、as i might try、might i as try,原题是：——,I coud't remember where I have ever seen her “it is hard to walk away try as i might ___ , I couldn't lift the box .为什么选B不选D___ , I couldn't lift the box .A.As I might try B.Try as I might C.As try I might D.Try though I might __,my cousin still couldn't get the door open a might she as try b as she might try__,my cousin still couldn't get the door opena might she as try b as she might try c she might as try d try as she might ______ carolina could't get the door open.try as she mightas she might tryshe might as trymight she as try might as Try as she might ,she could not open the door.might在句子中作谓语吗?还是其他什么? AS 和THOUGH引导状语从句的区别__________ I couldn't lift the box.A,As I might try B,Try as I might C,As try I might D,Try though I might这题为什么不选D要选B？D不能选吗？