（1）她一整天都在帮妈妈做家务.
She spent the whole day helping her mother with the housework.
2）他们都决定参加夏令营.
They both decided to take part in the summer camp.(2个人)
They all decided to participate in the summer camp.(3个人)
take part in =participate in
（3）我太饿了,吃了很多饺子.
I was so hungry that I had a lot of dumplings.
Hungry as I was,I ate a good many dumplings.
两句意思一样,只是后面一句漂亮一点咯：）