* Interrupting: "He tried to explain his reasoning, but she interjected with a sharp question."
* Adding a comment: "During the presentation, the CEO interjected a humorous anecdote."
* Introducing a new topic: "The meeting was focused on budget cuts, but the manager interjected a discussion about employee morale."
* Adding emphasis: "I interjected a few key facts to strengthen my argument."
* Adding a personal opinion: "The debate was heated, but I interjected a call for calm and reason."
Remember, "interject" implies a sudden, often unexpected, insertion into a conversation or discussion.