你今天是不是很忙？

Nǐ jīntiān shìbúshì hěn máng?

Are you very busy today?

今天是不是太冷了？

Jīntiān shìbúshì tài lěng le?

Is it too cold today?

你是不是中国人？

Nǐ shì bu shì Zhōngguórén?

Are you Chinese?