meaningfu是l副词词性吗,为什么mean(意思）还要加ing?还要加ful?不懂者不要回答

my school life is very interesting but meaningfu
的段文改错

英语翻译
　April 12 is memorable because our class had a meaningful experience on that day.In the morning,we bicycled to the suburbs to plant trees,talking and laughing all the way.Upon arrival,we began to work immediately.Some were digging holes.Some were carrying and planting young trees.Others were watering .After getting the work done,we put up a board reminding people to protect the trees.Before leaving we took some photos to record our green action.Seeing the lines of trees,we all had a sense of achievement.We feel it’s our duty to protect and beautify our environment.