小心的祈使句用英文怎么说

"Be careful" 是一种常见的小心祈使句。它来源于英语中的动词"be"和形容词"careful"。

例句:

Be careful when you cross the street.
(过马路时小心)
Be careful not to break the vase.
(小心不要打碎花瓶)
Be careful with that knife, it's sharp.
(小心那把刀，它很锋利)