The phrase "come up" has several meanings depending on the context. For example, in a conversation, you might say, "Something came up, so I had to cancel our meeting," which means an unexpected event occurred. If someone mentions an idea during a discussion, you can say, "That topic came up during the meeting." It can also refer to something rising, like "The sun came up at six this morning," or someone approaching physically, as in "He came up to me and asked for directions." In exams or interviews, people often say, "I hope that question doesn't come up," meaning they hope it won’t appear. So, whether it’s about something happening, appearing, rising, or being mentioned, “come up” is pretty versatile in everyday English!

The word attend is a verb that means to go to or be present at an event, like a meeting, class, or concert—for example, “I plan to attend the conference tomorrow.” Someone who attends an event is called an attendee, which is a noun—so you might say, “There were over 300 attendees at the workshop.” Finally, attendance is also a noun, but it refers to the act of being present or the number of people present—for instance, “Attendance was low due to the bad weather.” So basically, you attend something, an attendee is the person who attends, and attendance is the overall presence or headcount.