幼稚天真用英语怎么说

"幼稚天真" 用英语可以表示为 "naive" 或 "innocent"。

"Naive" 来源于法语 "naïf"，意思是天真无邪或无知。"Innocent" 来源于拉丁文 "innocens"，意思是清白无罪。

下面是一些例句：

He was so naive that he believed every word the salesman said. 他太天真了，以为推销员所有的话都是真的。
She has an innocent look on her face. 她的脸上有一种天真的表情。
He was too innocent to suspect that his friend had stolen his wallet. 他太天真了，没有怀疑过他的朋友偷了他的钱包。