I'm going to skip my grandparent's funeral to attend an important work training
Is it really that important? Why would you skip your grandpa's funeral for that?
I strongly believe the funeral is not so important if you are alive
You are expected to attend a family funeral. You shouldn't be skipping them.
Fair enough, now that you have come in the way of my work training I will do it.
Glad that you reconsidered, your family would be thankful for you attending such an important event. I'm sure your grandpa would be proud of you, too.