怎样翻译这些话

楼上 小学英语就教过两个人中有一个是自己一定要把自己放在后面
My mother and I took part in the volunteer activity.this activity is hold to cheer up poor children,we gave them some small gifts.

I and mother participated in the volunteer activity. This activity is salutes the impoverished child, we have given them some small gifts.

I and mother？ 是这么说吗
主语应该是 My mother and I

http://www.rrenglish.com/basic/grammar/5084.shtml#

二楼的，两个独立句之间要用and的吧

Mum and I took part in the volunteer activity.We send some little gifts expressing sympathy and solicitude for the children living under the poverty line .