had juest done..when ,were/was doing..when,be about to do ..when 啥意思啊
问题描述：
had juest done..when ,were/was doing..when,be about to do ..when 啥意思啊
答
had just done表示刚做完.紧接着就发生了.were/was doing.when当.的时候在做.be about to do when当.的时候准备要做.