I stood dthere until the plane in the sky

I stood dthere until the plane in the sky She stood by as I struggled to lift myself with my right hand until I could hook the bar with my other elbow.这句话中的as是什么意思? i stood there patiently until he _____ his work答案为什么是had finished.为什么用过去完成时能直接用过去时吧。这两个动作谁先谁后呀。 they stood there until the train d___at last stood stood 用连词填空（since,as,when,as soon as,while,if,after,before,until或because1._____ I get to Beijing,I will write to you.2._____all the students stood up,Millie came into the room. 英语翻译I've stood for photos I stood up,struggling for balance as... i hate being stood up 怎么翻译 Beyond horrified with myself,I stood up. Her mother stood in the wind watching her until she d_______in the distance Last night i had to walk have because it was too______ any taxisA to be B being C to have been Dthere to be I think ______ many tourists on the moon in 100 yearsAthere were Bthere will be Cthere will have Dthere is going to be she walked up to()a.where did i stand b.where i stood c.i stood there d.where i stood there I love you until forever! UNTIL I FIND YOU怎么样 I stood where the roads joined.i stood in the place where roads joined.两句话都对吗?为什么?