必须英语怎么写?

Oh, you want to know how to write "必须" in English, huh? Alright, let me give it a shot. You could say "It's necessary," "It must be done," or "It's required." Depends on the context, really. For example, if we're talking about a law or a rule, "It's required by law" might fit. If it's something that's essential, "It must be done" would work. And if you're giving an order or instruction, "It's necessary" would be the way to go. Just gotta pick the right phrase for the situation, ya know?