I don't think it is
I don't think that's right.
No creo que sea el mejor momento para que hablemos.
I don't think this is the best time for us to talk.
I don’t think it’s honest.
I don't think so.
No creo que sea muy feliz viviendo con su suegra.
I don't think she's very happy living with her mother-in-law.
I don't think he's being sincere.
I don't think it's that easy.
No creo que sea una frase irregular.
I don't think it's an irregular phrase.