必须要有用英语怎么说

"必须要有"可以用英语表达为"must have"或"have to have"。
"must have"是一个情态动词，意思是"必须、应该"，它表示一种强制性或义务。例如：
You must have a valid passport to travel internationally. (你出国必须有一本有效的护照。)
They must have arrived by now. (他们现在肯定已经到了。)
"have to have"是一个固定短语，意思与"must have"相同。例如：
You have to have a driver's license to operate a vehicle. (你开车必须有驾驶执照。)
We have to have a meeting to discuss the project. (我们必须开会讨论这个项目。)
希望这些例句能帮助你理解这两个表达的用法。