as she has been ill,perhaps she will need some help句中的AS什么用法及原因

as she has been ill,perhaps she will need some help句中的AS什么用法及原因 Her mother has been ill（ ） she came to Beijing last week A.since B.as C.until D.When She has been ill for over two days .(改为同义句） she has been ill for____ ____two days. she has been ill for 3 days,这里为什么要用been,直接she has ill 不行吗 （ ）she has been ill ,perhaps she'll need some helpA ButB ThoughC AsD For she has been ill in bed for many days and she is too w____to walk now She has been ill ＿＿＿ more than tShe has been ill ＿＿＿ more than two weeks.（用for或since填空 his grandma has been ill in hospital for a week.now she is even_____(illness） she has been ill ____ days中间一个单词填什么? She has been ill since last week.How is she now?-She is _____ today.A.worseB.illerC.worstD.much more ill She has been reading English books for as long as she can remember.怎么翻译? she has been----- abroad 3 yearsa.as early as b,as soon as c.as long as He has come instead of his elder sister.She (is) ill.把is改成has been行吗? because of the bad weather ,my mother fell ill and lay in bed.she has beenA has been ill was illB FELL ill has fallen illC fell ill has been illD fell ill is illbecause of the bad weather my mother ---------and lay in bed .she -----for a week .选什 Where has she been? 请帮我分析一下这句话:Perhaps she’ll need some help,especially as she’s been ill.as引导的状语从句为什么用这个时态? She has fallen ill for a week 5.He looked as if he _____ ill for a long time A.was　　 B.Were C.has been　　 D.had been