by just now为甚么要加“by"

by just now为甚么要加“by A letter ( ) by Jim just now. i just by watch要不要加ing by now Did you hear someone ________ by just now?(walk) The cloth was---------by mother just now(lay) judge by是甚么意思? I just stop by! by now是什么意思? by for now by now同义短语 We all saw him run out of the room just now.He ()()()() out of the room by ()() just now. We heard Betty sing a song just now.Betty _______ ______ _____ _______ a song just now by us we heard betty sing a song just now.betty___ ____ ____ _______a song just now by us 关于by sea的问题.比如说：by sea/by air /by land等,by前面要加定冠词吗? She had just arrived by train.找出错误为什么had和arrived之间不能加just The witness questioned by the police just now gave very different descriptions of the fight.为什么是questioned而不是being questioned? 英语翻译随便问问,刚才你在哪儿?用英语翻译 并用上by ,where,be,just,now