She was forever running errands for her housebound grandmother...是什么意思？

She was forever running errands for her housebound grandmother...

她总是在为她不方便外出的祖母跑前跑后。

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

forever

adv. 永远，不断地，无休止地，老是，经常；n. 永恒，极长的一段时间；

例句
Although they're expensive, they last forever and never go out of style...
尽管价格昂贵，但它们经久耐用，永不过时。

running

n. 跑步，运转，流出；adj. 跑着的，流动的，连续的，操作中的，运转着的；v. 跑，运转(run的ing形式)；

例句
The rate of inflation is running at about 2.7 percent.
通货膨胀率大约为2.7%。

errands

n. errand的复数，差使( errand的名词复数 )，差事；

例句
She was forever running errands for her housebound grandmother...
她总是在为她不方便外出的祖母跑前跑后。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

her

pron. (she的宾格)她，(she的所有格)她的，她，指某个国家，（一艘）船；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

housebound

adj. 居家不外出的，不能离家的；

例句
She was forever running errands for her housebound grandmother...
她总是在为她不方便外出的祖母跑前跑后。

grandmother

n. （外）祖母，老奶奶，女祖先；vt. 当…的祖母；vi. 当祖母；

例句
The newspaper contacted his grandmother to trace his present address, and later doorstepped him at his home.
报纸联系了他祖母，查到了他现在的住址后便前往登门采访。