You'd better tell him the truth. 你最好跟他说实话。

　　He was trying to tell us a joke, but we didn't get it. 他本来想给我们说一个笑话，不过我们都没听懂。

　　He's not good at telling lies. 他不大擅长说谎。

　　My son said he was getting an A in this class. 我儿子说自己能在这次考试中得 A。

　　He told a lie. He is doing very poorly. 他说谎了，他的成绩很糟糕。