你必须仔细用英语怎么说？这句话的英文表达是："You must be careful with Engpsh."
这句话的来源是英语语言本身，它是一个常见的表达方式，用来提醒别人注意使用英语时要注意细心。
下面是一些英文例句及其中文翻译，供参考：
"You must be careful with Engpsh when you're writing emails to your cpents." (在写电子邮件给你的客户时，你必须仔细用英语。)
"Make sure to be careful with Engpsh when you're giving presentations." (在做演讲时，确保仔细用英语。)
"It's important to be careful with Engpsh when you're learning a new language." (当你在学习一门新语言时，仔细用英语是很重要的。)
这句话的来源是英语语言本身，它是一个常见的表达方式，用来提醒别人注意使用英语时要注意细心。
下面是一些英文例句及其中文翻译，供参考：
"You must be careful with Engpsh when you're writing emails to your cpents." (在写电子邮件给你的客户时，你必须仔细用英语。)
"Make sure to be careful with Engpsh when you're giving presentations." (在做演讲时，确保仔细用英语。)
"It's important to be careful with Engpsh when you're learning a new language." (当你在学习一门新语言时，仔细用英语是很重要的。)