天真 Englisch:

It's naive of you to believe that.

Don't be so naive!

You must be very naive to be taken in by such a story.

The naive man blushed with shame.

In most cases, people, even the most vicious, are much more naive and simple-minded than we assume them to be. And this is true of ourselves too.

Are you still letting last night's fight bother you? That's so naive.

Am I that selfish or he's just too naive?

Stop slagging off my brilliant idea, it's not naive at all!

When she first saw the size of it, my naive girlfriend was blown away.

The townspeople were astonishingly naive about what the smugglers were.

They were too naive to understand the necessity of studying.

a naive person lacks experience of life and tends to believe things too easily

Innocence personified, being naive in such a world can be quite a burden.

Andy had a sweet, naive look when he smiled

/naɪˈiːv/ She was very naive to ​believe that he'd ​stay with her.