因为今天外婆生病了.
Because my grandma is sick today.
（grandma = 外婆,sick = 生病）
我去了杭州人民医院
I went to the People's Hospital of HangZhou
那时妈妈不在这,爸爸也外出了
My mother was not here at the time,and father had gone out too.
（那时 = at the time）
我就代替他们照顾外婆
I'm taking care of their gramdma for them.
（taking care = 照顾）
我从护士们那里拿来了外婆的中饭
I brought my grandma's lunch from the nurses
（拿来 = bring,从某某人那里拿来某某东西是：Brought sthing from someone）
这些(工作)非常忙~又好辛苦啊
These (jobs) are very busy and tiring.
(工作 = jobs.忙 = busy,幸苦 = tiring）
但我的心却很热 这正是给予外婆的爱
But my heart is very warm,because of my love for my grandma.
（在这里不用 hot,用 warm 更适合点）
楼主,我不是故意想改变你翻译的那些词.
只是很多句子,根本就不通.对不起了.
如果我用了新的词,我帮你把意思写了出来.