(英语)这里为什么用since不用till?We have lived here ________ we moved to Shanghai.A.whenB.tillC.sinceD.as我选了B请大人分析

He has lived here since 1992.这里为什么用has lived而不用has been living? (英语)这里为什么用since不用till?We have lived here ________ we moved to Shanghai.A.whenB.tillC.sinceD.as我选了B请大人分析 为什么不用since The prince and princess lived a happy life since then不明白了 为什么这里用一般过去式?since可以不用现在完成时吗?求大神讲解 谢谢 It __four years since i joined the army.这里的is,为什么不用was呢? it is four years since I joined the army.这里的is,为什么不用was呢? 大学英语精读5,4A句子结构问题Since parents today are having fewer children their chances of having a child to be proud of “are lower than when families were large.since这里是because的意思么?句子为什么用when不用that?比较 We are friends since primary school.中为什么用are不用were?是英语九百句里的。 Since the days long ago ,adults and children have called their friends together这里接下去 to spend hours,even days PLAYING games.我想问这里为什么用playing 而不用 to play 【高考】定语从句The book was written in1946,___the education system has witnessed great changes.A.when B.during when C.since then D.since when答案选D 为什么要用since?为什么要用when不用其他引导词?那这里先行词是BO A:Is your grandpa still smoking B:No,it's years since he smoked.这里为什么用since We have been living here since 1959 这里的have为什么不用过去时had 为什么live变成ing的形式 为什么英语中电话用语表示“这里是…（人名）”用this is,而不用that is呢? y英语It is important toIt is important to all living things,这里为什么用to 不用 for 英语:这里为什么不用quick而用quickly呢?the nerve poison far more quickly than the blood poison 英语:这里为什么不用quick而用quickly呢?the nerve poison far more quickly than the blood poison 直到我亲眼看见它,我才相信 用英语怎么说没直到啊 [ənˈtil,ʌnˈtil] trust[trʌst]? He lived in Beijing since he was born为什么用过去式was,不用过去分词been