1. The janitor neglected his duty on the day the robbers broke into the school.2. The deadbeat father has never provided for his family.
 neglect one's duty deadbeat irresponsibleneglect one's duty 是某人失職的很貼切的英文說法。而 deadbeat 指不履行義務的人, 通常指父母對小孩失職.
All the work I've been putting into this project has been all for nothin because my boss is shutting it down.