用英语说假的怎么说

"Lie" 是说假话的常用词。这个词最早起源于古英语，意思是"非真实的事实或声明"。它可以用来描述一个人说的话，也可以用来描述一种状态。
例句：
He told a lie when he said he had finished the project. 他说完成了项目，其实是在撒谎。
The company's statement is nothing but a lie. 这家公司的声明不过是谎言。
She is living a lie by pretending to be someone she's not. 她假装成另一个人而过着虚假的生活。
这个词同时还有另一种用法，指在躺床上或水平面上，没有支撑物，躺着。
例句:
The baby was asleep, lying on his back.
He was lying on the couch watching TV.
In summary, "lie" is a word that means an untruthful statement or actions. It can be used to describe something that is not true or a person who is not being truthful, and also can be used as a verb indicating someone is lying down on a surface.