（1）她一整天都在帮妈妈做家务.用英语怎么说?

（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：）

(1)She helps her mother do some housework all day. (2)They all decided to take part in summer camp. (3)I was too hungry so I ate lots of dumplings

She has been helping her mother do housework all day.(过去完成进行时表示一直）
They all decided to take part in the summer vacation.（过去时表示决定过了）
I was hungry,so I ate a lot of dumplings.（过去时）

She spent a whole day helping her mother doing housework.
They decided to take a part in the summer camp.
I was so hungrey that i ate o lot of dumplings.

(1)She helped her mother do housework all day.
(2)They decided to join the summer camp.
(3)I was so hungry,and eat lots of dumplings.
希望帮到你^^

All day she helped her mother do the housework
They all decide to join summer camp
I was so hungry, eat a lot of dumplings