现在我的日常生活发生了巨大变化,我真的很怀念过去和你们度过的日子(change ,when)

Now my life has changed dramatically, I really miss the days of the past when I spent with you.
My mother is so busy that has no time to go shopping.
Why he spend so much time to chat with firend before?
His biggest problem is that he has been way too busy to take care of his children.
希望能帮上楼主!