Yes, it is. No, it's not.

[Rachel Adams]

Hello.
Are short answers in such questions without adding nouns as in #1 considered informal?

1. 'Is it a kite?' Yes, it is.' 'No, it's not.'

2. 'Yes, it is a kite.' 'No, it's not a kite.'

 

[emsr2d2]

With a question/answer combination in a context like that, I don't think there's any question of formal/informal. I'm not even sure what you think "formal/informal" means. Can you explain what you think the difference is.

Is it a kite?
Yes.
Yes, it is.
Yes, it's a kite.
Yes, it is a kite.

All four answers are grammatically correct and natural, although the first would be more common (in my opinion).

 

[Rachel Adams]

With a question/answer combination in a context like that, I don't think there's any question of formal/informal. I'm not even sure what you think "formal/informal" means. Can you explain what you think the difference is.

Is it a kite?
Yes.
Yes, it is.
Yes, it's a kite.
Yes, it is a kite.

All four answers are grammatically correct and natural, although the first would be more common (in my opinion).

I meant standard forms that are not considered rude. I thought 'it's' is not formal while full forms such as 'it is' or 'it is not' are formal/polite. :shock: in such answers as mine.
I was wrong. I don't know why also thought that 'I'm', 'he's', are informal and that if I ended my sentence with 'yes, it is' without adding 'kite' my sentence won't sound natural.

 

[GoesStation]

Are short answers in such questions without adding nouns as in #1 considered informal?

1. 'Is it a kite?' Yes, it is.' 'No, it's not.'

No.

We're all friends here, Piscean. You don't have to be so formal.

 

[Yankee]

I would consider it typical, not unusual and brief.