为什么She couldn't wait to open them just now.中的open不用过去式

Try ____ she might,Sue couldn’t get the door open.为什么填as?语法上 I___(try)to open the door but I couldn't 1.Try as she might,she couldn't get the door open.前半句怎么理解? ERROR;COULDN'T OPEN RESOURCE\ENGLISH.TTF! she can't speak to you now为什么不用speaking __,my cousin still couldn't get the door open a might she as 最好说明理由1.I can't wait ______ the present box.A.open B.to open 她迫不及待地打开盒子看看里面的礼物是什么 she can't wait to open the box to see w they don't open them u__Christmas morning Don't open your eyes.Keep them ( ) He can't open the door because he ______ his key just now.横线 keep eyes wide open为什么不用open wide