You'd better tell him the truth. 你最好跟他說實話。
He was trying to tell us a joke, but we didn't get it. 他本來想給我們說一個笑話,不過我們都沒聽懂。
He's not good at telling lies. 他不大擅長說謊。
My son said he was getting an A in this class. 我兒子說自己能在這次考試中得 A。
He told a lie. He is doing very poorly. 他說謊了,他的成績很糟糕。