By the time后面的主语必须用完成时吗?By the time you come back next year,our son will be 8 years old.到你明年回来的时候,咱们的儿子就8岁了呀!难道这里的will be 8 years old 非得用will have been 8 years old

By the time后面的主语必须用完成时吗?By the time you come back next year,our son will be 8 years old.到你明年回来的时候,咱们的儿子就8岁了呀!难道这里的will be 8 years old 非得用will have been 8 years old by the time的用法.有2个问题.by the time 可以用在表示将来的句子中吗?我看有些回答说的都是表示过去.所以我有点不太确定.然后,by the time 后面必须接从句吗?例如,by the time,i will seek you.如果句子 This is the first time that I have been abroadthe first/second/third time 后面跟的定语从句,时态为什么用完成时 By the time by the end ofBy the time一般要怎么用什么时候要用完成式 By the end of怎么用 by the time 的用法 By the time he was 10,he ____(make) a living by selling newspapers.By the time he was 10,he ____(already make) a living by selling newspapers.答案是was already making可by不都是用完成时的吗?应该是过去完成时才对啊?By the time it is the first time that I -have come to BeiJin为什么要用完成时啊,后面 英语翻译还有by the time后面,要用什么时态 为什么是time goes by而不是time go by?老师说不可数名词作主语看作单数,所以后面用goes,我还是不懂,能不能再讲的通俗易懂点啊 宾语从句THAT后面的主语必须是除这个句子主语外的其他主语吗 do you know our town at all? no,this is the first time i ____hereA)was B)have beenC)come D)are coming请帮我翻译一下,为什么要the first time后面要用完成时态2)we went to the exhibition yesterday_________A)by a carB)by carsC)in a ca in time ,on time ,by the time 的区别, By the time the speaker entered the hall,all the listeners were seated为什么后面可以用were seated,前面不是BY+过去的时间吗? By 12 o'clock 可以用　by the time of 12 o'clock吗?因为 by the time of last term 就可以说出成by l就可以说成by last term!我想知道by 后面加时间的时候可不可以酱紫?by the time of her death 等于 by her death 是不是 被动语态by后面跟的是主语还是宾语?就是说比如：I like the dog.那被动语态是不是应该写成The dao is liked by I.还是写成The dao is liked by me. 这句话 改为被动 为什么后面的动作 要用完成时 一般都什么时候用完成时?原句：it is thought that the prisoner escaped by climbing over the wall.改为：the prisoner is thought to have escaped by climbing over the wall如 关于句子的主语的The last time i was there he introduced me by saying,------------.这应该是两个句子,我认为前面的是时间状语从句后面是主句,但为什么总觉得这句子不想例如名词性从句那样有固定的词 by the time ,by then