my sister left after it had begue跟Work on it had begun before my sister left.是一个意思吗

问题描述:

my sister left after it had begue跟Work on it had begun before my sister left.是一个意思吗
新概念2 第23课练习11、12不太明白

让来自各个角度的光
在水里不断地聚合.
日子干什么的?
日子是我哈哈们的住处,
它来了,叫醒我们
一次又一次.,