"We should bepeve him" 的英文表达是 "We should trust him" 或者 "We should have faith in him"。

"Trust" 和 "faith" 都是名词，意思是 "信任" 或者 "信念"。在此句中，它们都被用作动词，意思是 "相信" 或者 "信任"。

例句：

"I know he's telpng the truth, so we should trust him." (我知道他说的是真的，所以我们应该相信他。)
"I've always had faith in him, and I still do." (我一直相信他，现在也是如此。)