Can だ be left off in informal sentences?


In declarative statements I’ve gathered that saying just 「これ新聞だ」for example
would be too forward or a bit aggressive. So could you just say 「これ新聞」or even
just 「新聞」for informal sentences?

I understand that い adjectives can be left on their own but I’m just not sure
how to write informal sentences with な adjectives and nouns and not using です.




I wouldn't say using ~だ is "too aggressive", though it does have an aggressive
feel to me. Especially if you are talking in an informal setting I wouldn't be
too concerned with it. (It was formal, you would probably be using 〜です anyway)

I think you can often omit the だ for a softer feel, however in practice ~だね or
~だよ is pretty common, at least in informal conversation.

