英语冠词语法题by the time he was 38,he had become principal of a university.其中,为什么principal 前面没有冠词?

英语冠词语法题by the time he was 38,he had become principal of a university.其中,为什么principal 前面没有冠词? 英语冠词语法基本用法 冠词的使用,英语高手请进by weight ,by the dozen,什么时候by后的名词前加冠词是by+物质名词 前不加冠词，by+计量单位 前加冠词吗？ 英语冠词的相关内容、语法== 语法冠词Are you going to do it——second time.是填the 还是a,为什么 英语冠词的题 by the time ,by then 英语“到那时为止”by the time 可否译为by that time 英语,连接下列句子,以 By the time… 开头.Example:The H连接下列句子,以 By the time… 开头.Example:The Hubble’s eagle eye will send us thousands of pictures.You will read this.By the time you read this,the Hubble’s eagle eye wi By the time by the time 为什么by car/bus不加冠词,但是by the bridge要加冠词? 求大师详解：by that time,by then,by the time都有“到时候”的意思,具体含义和语法上该怎么分辨呢? 瑞典语语法 på den härpå den här这三个词语可以用在一起么,på at在的意思,den the是冠词么,här here这里,在这个这里,中文说不通,英语也说不通 i want to retire by the time i'm thirty.请分析语法结构我不懂为什么不是by the time when i'm thirty.而是by the time i'm thirty. 问英语冠词语法问题3______ of the material for this coat is silka)25%b)one fourthc)the fourth ofd)the one fourth 问英语冠词语法问题2the house burnt into ashes.it was beyond ___ hope of ___ repaira)the./b)/,ac)the,thec)/,/ 被动语态的by后面可以加冠词the吗?